Genesis 20:10

10 Abimelech went on to Abraham, "Whatever were you thinking of when you did this thing?"

Genesis 20:10 Meaning and Commentary

Genesis 20:10

And Abimelech said unto Abraham
Continuing his discourse with him: what sawest thou, that thou hast done this thing?
he desires to know what he had observed, either in him or his people, that gave him any reason to conclude that they were a lustful people, and would stick at nothing to gratify their lusts, which put him upon taking such a method to secure his life, lest they should kill him for his wife's sake.

Genesis 20:10 In-Context

8 Abimelech was up first thing in the morning. He called all his house servants together and told them the whole story. They were shocked.
9 Then Abimelech called in Abraham and said, "What have you done to us? What have I ever done to you that you would bring on me and my kingdom this huge offense? What you've done to me ought never to have been done."
10 Abimelech went on to Abraham, "Whatever were you thinking of when you did this thing?"
11 Abraham said, "I just assumed that there was no fear of God in this place and that they'd kill me to get my wife.
12 Besides, the truth is that she is my half sister; she's my father's daughter but not my mother's.