I see support for annihilationism all throughout the Bible. Here is just a sample:
NIV Genesis 3:22 And the LORD God said, "The man has now become like one of us, knowing good and evil. He must not be allowed to reach out his hand and take also from the tree of life and eat, and live forever."
I have no idea where this verse says anyone will get endless annihilation.
NIV Psalm 37:10 A little while, and the wicked will be no more; though you look for them, they will not be found.
And yet a little, and the wicked is not, And thou hast considered his place, and it is not. (YLT)
"shall not be—literally, "is not"—is not to be found."
"Shall not be, to wit, in the land of the living. He shall be dead and gone, as this phrase is commonly taken."
It was not true that in a "little while" the wicked would be endlessly annihilated. In much longer than "a little while", in fact thousands of years later for those of that time, they will be raised back to life.
NIV Isaiah 66:24 "And they will go out and look on the dead bodies of those who rebelled against me; the worms that eat them will not die, the fire that burns them will not be quenched, and they will be loathsome to all mankind."
NIV Malachi 4:3 Then you will trample on the wicked; they will be ashes under the soles of your feet on the day when I act," says the LORD Almighty.
NIV Revelation 20:14 Then death and Hades were thrown into the lake of fire. The lake of fire is the second death.
NIV 2 Peter 2:6 if he condemned the cities of Sodom and Gomorrah by burning them to ashes, and made them an example of what is going to happen to the ungodly;
Burned up/ashes does not necessarily equate to being endlessly annihilated out of existence. People are cremated, i.e. burned up, every day. Guess what? Everyone of them will be resurrected back to life. They can only be dead until death is abolished (1 Cor.15:26) & God becomes "all in all" of everyone who was in Adam (v.22).
NIV John 3:16 For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.
NIV Romans 6:23 For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord.
Jesus Himself spoke of aionios life in the aion to come (Lk.18:30; Mk.10:30), thus limiting it, whereas Scripture speaks of multiple aions/eons/ages to come (Eph.2:7, Rev.11:15, etc). In Ephesians 1 & 2 Paul the former Pharisee spoke of both the coming age (Eph.1:21) and multiple future ages (2:7).
It is immortality that gives believers endless life, not obtaining life aionion in a future aion/age, e.g. the millennial age kingdom of Christ that last 1000 years.
From a review of a book by Ilaria Ramelli, namely The Christian Doctrine of Apokatastasis: A Critical Assessment from the New Testament to Eriugena (Brill, 2013. 890 pp):
"...in a passage in Origen in which he speaks of “life after aionios life” (160). As a native speaker of Greek he does not see a contradiction in such phrasing; that is because aionios life does not mean “unending, eternal life,” but rather “life of the next age.”
http://journalofanalytictheology.com/jat/index.php/jat/article/viewFile/jat.2015-3.181913130418a/271
Similarly, in support of the above, Daniel 12:2-3:
The context supports the view that both the life & the punishment referred to in v.2 are of finite duration (OLAM), while v.3 speaks of those who will be for OLAM "and further".
2 From those sleeping in the soil of the ground many shall awake, these to eonian life
and these to reproach for eonian repulsion." 3 The intelligent shall warn as the warning
of the atmosphere, and those justifying many are as the stars for the eon and further."
(Dan.12:2-3, CLV)
The Hebrew word for eonian (v.2) & eon (v.3) above is OLAM which is used of limited durations in the OT. In verse 3 of Daniel 12 are the words "OLAM and further" showing an example of its finite duration in the very next words after Daniel 12:2. Thus, in context, the OLAM occurences in v.2 should both be understood as being of finite duration.
The early church accepted the following Greek OT translation of the Hebrew OT of Daniel 12:3:
καὶ οἱ συνιέντες ἐκλάμψουσιν ὡς ἡ λαμπρότης τοῦ στερεώματος καὶ ἀπὸ τῶν δικαίων τῶν πολλῶν ὡς οἱ ἀστέρες εἰς τοὺς αἰῶνας καὶ ἔτι[and further]
Notice the words at the end saying KAI ETI, meaning "and further" or "and still" or "and yet" & other synonyms.
eti: "still, yet...Definition: (a) of time: still, yet, even now, (b) of degree: even, further, more, in addition." Strong's Greek: 2089. ἔτι (eti) -- still, yet
εἰς τοὺς αἰῶνας καὶ ἔτι means "into the ages and further" as a translation of the Hebrew L'OLAM WA ED[5703, AD]
So this early church Greek translation of the Hebrew Scriptures agrees with the above translation (& those below) using the words "and further" & similarly.
3 and·the·ones-being-intelligent they-shall- warn as·warning-of the·atmosphere
and·ones-leading-to-righteousness-of the·many-ones as·the·stars for·eon and·futurity (Daniel 12:3, Hebrew-English Interlinear)
http://www.scripture4all.org/OnlineInterlinear/OTpdf/dan12.pdf
2 and, many of the sleepers in the dusty ground, shall awake,—these, [shall be] to age-abiding life, but, those, to reproach, and age-abiding abhorrence; 3 and, they who make wise, shall shine like the shining of the expanse,—and, they who bring the many to righteousness, like the stars to times age-abiding and beyond. (Daniel 12:2-3, Rotherham)
2 And the multitude of those sleeping in the dust of the ground do awake, some to life age-during, and some to reproaches—to abhorrence age-during.
3 And those teaching do shine as the brightness of the expanse, and those justifying the multitude as stars to the age and for ever*. (Dan. 12:2-3, YLT)
* for "for ever" Young of YLT says substitute "age during" everywhere in Scripture:
http://heraldmag.org/olb/Contents/bibles/ylt.pdf
Daniel 12:2-3 was the only Biblical reference to "life OLAM" Jesus listeners had to understand His meaning in John 3:16 & elsewhere.
Verse 3 speaks of those bringing "many" to righteousness. The "many" of verse 2, i.e. universal salvation.
https://www.tentmaker.org/books/hope_beyond_hell.pdf