'Son in law' in the Bible

And David said to Saul, Who am I, and what is my life, or my father's family in Israel, that I should be son-in-law to the king?

And Saul said, I will give her to him, so that she may be a trap to him, and so that the hand of the Philistines may be against him. And Saul said to David a second time, Today you shall be my son-in-law.

And Saul commanded his servants, Talk with David secretly and say, Behold, the king delights in you, and all his servants love you. And now be the king's son-in-law.

And Saul's servants spoke these words in the ears of David. And David said, Is it a light thing to be a king's son-in-law, since I am a poor man and of little worth?

And when his servants told David these words, it was right in the eyes of David to be the king's son-in-law. And the days were not fulfilled.

And David arose and went forth, he and his men. And they killed two hundred men of the Philistines. And David brought their foreskins, and they gave them in full number to the king so that he might be the king's son-in-law. And Saul gave him his daughter Michal for a wife.

And Ahimelech answered the king and said, And who is so faithful among all your servants as David, who is the king's son-in-law, and who goes at your bidding, and who is honorable in your house?