'Son in law' in the Bible

But David said to Saul, "Who [am] I, and [who are] my relatives, the clan of my father in Israel, that I should be a son-in-law to the king?"

And Saul thought, "I will give her to him, so that she may be a snare for him and the hand of [the] Philistines may be against him." So Saul said to David, "For a second [time] you can become my son-in-law today."

Then Saul commanded his servants, "Speak to David in secret, saying, 'Look, the king [is] pleased with you, and all his servants love you. So then, become a son-in-law of the king.'"

And Saul's servants spoke these words {to David privately}. But David said, "[Is] it insignificant {in your sight} to become the son-in-law of the king, [as] I am a poor and lightly esteemed man?"

So his servants told David these words, and the matter {pleased David} to become the son-in-law of the king [as] {the specified time had not expired}.

And David got up, and he and his men went and struck down two hundred men [of the] Philistines. Then David brought their foreskins, and {they presented the full number} to become the king's son-in-law. Then Saul gave him Michal his daughter as [his] wife.

But Ahimelech answered the king and said, "And who among all your servants [is] as faithful as David? He [is] the son-in-law of the king who moves [quickly] to safeguard you and is honored in your house.