17:12 Now David was the son of this Ephrathite named Jesse from Bethlehem in Judah. He had eight sons, and in Saul’s days he was old and well advanced in years.
17:52 Then the men of Israel and Judah charged forward, shouting a battle cry. They chased the Philistines to the valley and to the very gates of Ekron. The Philistine corpses lay fallen along the Shaaraim road to Gath and Ekron.
23:3 But David’s men said to him, “We are afraid while we are still here in Judah! What will it be like if we go to Keilah against the armies of the Philistines?”
30:26 When David came to Ziklag, he sent some of the plunder to the elders of Judah who were his friends, saying, “Here’s a gift for you from the looting of the Lord’s enemies!”