Verses with the word affinity in the Old Testament (3 verses):
1 Kings 3:1
And Solomon made affinity with Pharaoh king of Egypt, and took Pharaoh's daughter, and brought her into the city of David, until he had made an end of building his own house, and the house of the LORD, and the wall of Jerusalem round about.
2 Chronicles 18:1
Now Jehoshaphat had riches and honour in abundance, and joined affinity with Ahab.
Should we again break thy commandments, and join in affinity with the people of these abominations? wouldest not thou be angry with us till thou hadst consumed us, so that there should be no remnant nor escaping?