"God came to Abimelech in a dream by night, and said to him, Behold, thou art but a dead man, for the woman which thou hast taken; for she is a man’s wife.
But Abimelech had not come near her: and he said, Lord, wilt thou slay also a righteous nation? Said he not unto me, She is my sister? and she, even she herself said, He is my brother: in the integrity of my heart and innocency of my hands have I done this.
And God said unto him in a dream, Yea, I know that thou didst this in the integrity of thy heart; for I also withheld thee from sinning against me: therefore suffered I thee not to touch her. Now therefore restore the man his wife; for he is a prophet, and he shall pray for thee, and thou shalt live: and if thou restore her not, know thou that thou shalt surely die, thou, and all that are thine.
...
So Abraham prayed unto God: and God healed Abimelech, and his wife, and his maidservants; and they bare children. For Yahweh had fast closed up all the wombs of the house of Abimelech, because of Sarah Abraham’s wife."
Ge 20

So, something I didn't notice until a friend pointed it out to me: "Yea, I know that thou didst this in the integrity of thy heart..." and "...Abimelech, and his wife...".

Abimelech had a wife, and took Sarah to also be his wife, and God said that Abimelech took another wife in the integrity of his heart: because he didn't know she was married, it was innocent according to God's direct statement. I hadn't noticed this, though I had read this Scripture several times - someone still had to point it out to me. But it's obvious once it's pointed out. Kind of embarrassed I hadn't seen it before. 🙃

Thank God for brothers and sisters in Christ who help each other learn the Scriptures!