'Father in law' in the Bible

Now Hobab the Kenite, Moses' father-in-law, had come up out of the town of palm-trees, with the children of Judah, into the waste land of Arad; and he went and was living among the Amalekites;

And his father-in-law, the girl's father, kept him there for three days; and they had food and drink and took their rest there.

And the man got up to go away, but his father-in-law would not let him go, so he took his rest there again for the night.

And when they got up to go away, his father-in-law, the girl's father, said to him, Now evening is coming on, so do not go tonight; see, the day is almost gone; take your rest here and let your heart be glad, and tomorrow early, go on your way back to your house.