וַיַּשְׁכֵּ֨ם דָּוִ֜ד ה֤וּא וַֽאֲנָשָׁיו֙ לָלֶ֣כֶת בַּבֹּ֔קֶר לָשׁ֖וּב אֶל־אֶ֣רֶץ פְּלִשְׁתִּ֑ים וּפְלִשְׁתִּ֖ים עָל֥וּ יִזְרְעֶֽאל׃ (ס)
So David rose up early, he and his men, to depart in the morning, to return into the land of the Philistines. And the Philistines went up to Jezreel.
Read midrashic interpretation of I Samuel 29:11: and classical rabbinic exegesis.