Commentary for I Samuel 27:1

וַיֹּ֤אמֶר דָּוִד֙ אֶל־לִבּ֔וֹ עַתָּ֛ה אֶסָּפֶ֥ה יוֹם־אֶחָ֖ד בְּיַד־שָׁא֑וּל אֵֽין־לִ֨י ט֜וֹב כִּ֣י הִמָּלֵ֥ט אִמָּלֵ֣ט ׀ אֶל־אֶ֣רֶץ פְּלִשְׁתִּ֗ים וְנוֹאַ֨שׁ מִמֶּ֤נִּי שָׁאוּל֙ לְבַקְשֵׁ֤נִי עוֹד֙ בְּכָל־גְּב֣וּל יִשְׂרָאֵ֔ל וְנִמְלַטְתִּ֖י מִיָּדֽוֹ׃

And David said in his heart: ‘I shall now be swept away one day by the hand of Saul; there is nothing better for me than that I should escape into the land of the Philistines; and Saul will despair of me, to seek me any more in all the borders of Israel; so shall I escape out of his hand.’

Rashi on I Samuel