'Father in law' in the Bible

And it will be announced to Tamar, saying, Behold, thy father-in-law going up to Timnath to shear his sheep.

She being brought forth, and she sent to her father-in-law, saying, By the man whose are these, by him I conceived. And she will say, Recognise, now, to whom the seal, the cords, and the rod, these.