Numbers 23:19
"God is not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do it? or hath he spoken, and shall he not make it good?"
Cross References (ranked by relevance)
And also the Strength of Israel will not lie nor repent: for he is not a man, that he should repent.
Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning.
That by two immutable things, in which it was impossible for God to lie, we might have a strong consolation, who have fled for refuge to lay hold upon the hope set before us:
For I am the LORD, I change not; therefore ye sons of Jacob are not consumed.
In hope of eternal life, which God, that cannot lie, promised before the world began;
Heaven and earth shall pass away: but my words shall not pass away.
For the gifts and calling of God are without repentance.
For the vision is yet for an appointed time, but at the end it shall speak, and not lie: though it tarry, wait for it; because it will surely come, it will not tarry.
Once have I sworn by my holiness that I will not lie unto David.
I will not execute the fierceness of mine anger, I will not return to destroy Ephraim: for I am God, and not man; the Holy One in the midst of thee: and I will not enter into the city.
Thou wilt perform the truth to Jacob, and the mercy to Abraham, which thou hast sworn unto our fathers from the days of old.
And yet this was a small thing in thine eyes, O God; for thou hast also spoken of thy servant’s house for a great while to come, and hast regarded me according to the estate of a man of high degree, O LORD God.