Achish was a Philistine, so why did David go to Gath to dwell with him. I mean, I know that Saul would never stop looking to kill David but on the other hand... the Philistines? Am I missing something here?
וַיָּקָם דָּוִד--וַיַּעֲבֹר הוּא, וְשֵׁשׁ-מֵאוֹת אִישׁ אֲשֶׁר עִמּוֹ: אֶל-אָכִישׁ בֶּן-מָעוֹךְ, מֶלֶךְ גַּת. וַיֵּשֶׁב דָּוִד עִם-אָכִישׁ בְּגַת הוּא וַאֲנָשָׁיו, אִישׁ וּבֵיתוֹ: דָּוִד, וּשְׁתֵּי נָשָׁיו, אֲחִינֹעַם הַיִּזְרְעֵאלִת, וַאֲבִיגַיִל אֵשֶׁת-נָבָל הַכַּרְמְלִית
And David arose. And he and the six hundred men who were with him, crossed over to Achish the son of Maoch, the king of Gath. And David dwelt with Achish in Gath, he and his men, each man and his household, David and his two wives; Ahinoam the Jezreelitess and Abigail the wife of Nabal, the Carmelitess.