The Counsels and Purposes of God are Immutable
Source: TTT
Psalm 33:11
The counsel of the LORD stands forever, the purposes of His heart to all generations.
Proverbs 19:21
Many plans are in a man’s heart, but the purpose of the LORD will prevail.
Jeremiah 4:28
Therefore the earth will mourn and the heavens above will grow dark. I have spoken, I have planned, and I will not relent or turn back.”
Romans 9:11
Yet before the twins were born or had done anything good or bad, in order that God’s plan of election might stand,
Hebrews 6:17
So when God wanted to make the unchanging nature of His purpose very clear to the heirs of the promise, He guaranteed it with an oath.