Act 7:6 And God spake on this wise, That his seed should sojourn in a strange land; and that they should bring them into bondage, and entreat them evil four hundred years.
Act 7:17 But when the time of the promise drew nigh, which God had sworn to Abraham, the people grew and multiplied in Egypt,
I can find no verse where Paul says from the promise to the land was 430 years. Acts 7:6 says "they should bring them into bondage, and entreat them evil four hundred years."
Which sounds like Paul is saying they were enslaved for 400 years.
.
Be advised that though Stephen, the first Martyr of the Church, said those words as is faithfully and historically recorded by Luke, Stephen did not get that info from the true history of the Torah, but from Jewish oral histories compiled in the years of exile when the LORD covered their seers and hid their prophets; because they missed the Message of Torah, God shut it, and blinded their eyes, until the Light should come.... -and so they made up stories.
Isaiah 29:
9 Stay yourselves, and wonder; cry ye out, and cry: they are drunken, but not with wine; they stagger, but not with strong drink.
10 For the Lord hath poured out upon you the spirit of deep sleep, and hath closed your eyes: the prophets and your rulers, the seers hath he covered.
11 And the vision of all is become unto you as the words of a book that is sealed, which men deliver to one that is learned, saying, Read this, I pray thee: and he saith, I cannot; for it is sealed:
12 And the book is delivered to him that is not learned, saying, Read this, I pray thee: and he saith, I am not learned.
13 Wherefore the Lord said, Forasmuch as this people draw near me with their mouth, and with their lips do honour me, but have removed their heart far from me, and their fear toward me is taught by the precept of men:
14 Therefore, behold, I will proceed to do a marvellous work among this people, even a marvellous work and a wonder: for the wisdom of their wise men shall perish, and the understanding of their prudent men shall be hid.
Jesus came to be the LIGHT, to the Jew first, and also to the Gentiles, but He did not begin to rebuke them for blindness and not knowing and for the fables they believed -except the Sadducees- when He walked among them...
He began to teach them afterwards -like Peter, with the sheet let down filled with the unclean things [which typed the Gentiles], and that was when Jesus taught Peter that "Jubilees" was not truth, but error, compiled in the Diaspora when the books/Message of Torah and the prophets were hid, and invented as fables to make the Law the "Be All-End All"...
and Paul said in 1 Cor:2
2 And I, brethren, when I came to you, came not with excellency of speech or of wisdom, declaring unto you the testimony of God.
2 For I determined not to know any thing among you, save Jesus Christ, and him crucified.
3 And I was with you in weakness, and in fear, and in much trembling.
4And my speech and my preaching was not with enticing words of man's wisdom, but in demonstration of the Spirit and of power:
5 That your faith should not stand in the wisdom of men, but in the power of God.
6 Howbeit we speak wisdom among them that are perfect: yet not the wisdom of this world, nor of the princes of this world, that come to nought:
And verse 7 is straight out of Enoch's revelation about the Son of Man in heaven, hidden in God before the ages, who was God, with God, and who was to come and is the Wisdom of God
The literal Greek rendering of that verse in English is -they then teach them made perfect by being born of the Spirit, " in demonstration of the Spirit and of power:"
7 But we speak/preach/teach wisdom, God in mystery hidden, which God ordained before the world unto our glory:
So I said that to say that Stephen's speech is historically accurately recorded, but is not true history as to the Torah record, which is indeed; "Thus saith YHWH".
Paul knew the Torah, and said "from the promise -Genesis 15- to the Law -at Sinai- was 430 years.
That is the Torah record as to the time line.