15 The king of Libnah; The king of Adullam;
Joshua 12:15 Cross References - MSTC
Joshua 10:29-30
29 Then Joshua went from Makkedah, and all Israel with him unto Libnah, and fought against Libnah.
30 And the LORD delivered it also into their hands, with the king also, and smote it with the edge of the sword and all the souls that were therein, and let nought remain in it, and did unto the king thereof as he did unto the king of Jericho.
1 Samuel 22:1
1 And David departed thence and escaped, and came unto the cave of Adullam. When his brethren and all his father's house heard it, they went thither to him.