Gen 13:15 For all the land which thou seest, to thee will I give it, and to thy seed for ever.
Im not sure if you'll accept this is a scripture that points toward eternal life, but Galatians reveals that this Seed was Jesus Christ.
So He was saying, to you Abraham and Jesus Christ the Messiah, I will give this "land" ( an heavenly land is what Abraham was looking for) FOREVER.
Abraham must have eternal life then if he is to continue in a land forever.
Psa 118:17 I shall not die, but live, and declare the works of the LORD.
How about these:
Psa 23:6 Surely goodness and mercy shall follow me all the days of my life: and I will dwell in the house of the LORD for ever.
Psa 37:18 The LORD knoweth the days of the upright: and their inheritance shall be for ever.
Psa 37:28 For the LORD loveth judgment, and forsaketh not his saints; they are preserved for ever: but the seed of the wicked shall be cut off.
Psa 37:29 The righteous shall inherit the land, and dwell therein for ever.
Psa 41:12 And as for me, thou upholdest me in mine integrity, and settest me before thy face for ever.
Psa 44:8 In God we boast all the day long, and praise thy name for ever.
A Psalm about eternal life:
Psa 61:1 [[To the chief Musician upon Neginah, [A Psalm] of David.]] Hear my cry, O God; attend unto my prayer.
Psa 61:2 From the end of the earth will I cry unto thee, when my heart is overwhelmed: lead me to the rock [that] is higher than I.
Psa 61:3 For thou hast been a shelter for me, [and] a strong tower from the enemy.
Psa 61:4 I will abide in thy tabernacle for ever: I will trust in the covert of thy wings. Selah.
Psa 61:5 For thou, O God, hast heard my vows: thou hast given [me] the heritage of those that fear thy name.
Psa 61:6 Thou wilt prolong the king's life: [and] his years as many generations.
Psa 61:7 He shall abide before God for ever: O prepare mercy and truth, [which] may preserve him.
Psa 61:8 So will I sing praise unto thy name for ever, that I may daily perform my vows.
Psa 73:26 My flesh and my heart faileth: [but] God [is] the strength of my heart, and my portion for ever.
Psa 73:27 For, lo, they that are far from thee shall perish:
Clearly telling that God is his portion forever(instead of an earthly land) and they that are far , perish and so they that are near, must not perish.. though he understands his flesh faileth.
Psa 79:13 So we thy people and sheep of thy pasture will give thee thanks for ever:
Dan 7:18 But the saints of the most High shall take the kingdom, and possess the kingdom for ever, even for ever and ever.
Psa 119:144 The righteousness of thy testimonies [is] everlasting: give me understanding, and I shall live.
Isa 26:19 Thy dead [men] shall live, [together with] my dead body shall they arise. Awake and sing, ye that dwell in dust: for thy dew [is as] the dew of herbs, and the earth shall cast out the dead.
Isa 55:3 Incline your ear, and come unto me: hear, and your soul shall live; and I will make an everlasting covenant with you, [even] the sure mercies of David.
Jer 38:20 But Jeremiah said, They shall not deliver [thee]. Obey, I beseech thee, the voice of the LORD, which I speak unto thee: so it shall be well unto thee, and thy soul shall live.
Eze 18:21 But if the wicked will turn from all his sins that he hath committed, and keep all my statutes, and do that which is lawful and right, he shall surely live, he shall not die.
Eze 18:22 All his transgressions that he hath committed, they shall not be mentioned unto him: in his righteousness that he hath done he shall live.
Eze 18:23 Have I any pleasure at all that the wicked should die? saith the Lord GOD: [and] not that he should return from his ways, and live?
Eze 18:24 But when the righteous turneth away from his righteousness, and committeth iniquity, [and] doeth according to all the abominations that the wicked [man] doeth, shall he live? All his righteousness that he hath done shall not be mentioned: in his trespass that he hath trespassed, and in his sin that he hath sinned, in them shall he die.
Eze 18:28 Because he considereth, and turneth away from all his transgressions that he hath committed, he shall surely live, he shall not die.
Eze 18:32 For I have no pleasure in the death of him that dieth, saith the Lord GOD: wherefore turn [yourselves], and live ye.
Eze 33:15 [If] the wicked restore the pledge, give again that he had robbed, walk in the statutes of life, without committing iniquity; he shall surely live, he shall not die.
Eze 33:16 None of his sins that he hath committed shall be mentioned unto him: he hath done that which is lawful and right; he shall surely live.
Hab 2:4 Behold, his soul [which] is lifted up is not upright in him: but the just shall live by his faith.