וַיִּגַּ֥שׁ הַפְּלִשְׁתִּ֖י הַשְׁכֵּ֣ם וְהַעֲרֵ֑ב וַיִּתְיַצֵּ֖ב אַרְבָּעִ֥ים יֽוֹם׃ (פ)
And the Philistine drew near morning and evening, and presented himself forty days.
Read halakhic rulings (Jewish law) on I Samuel 17:16 from the Mishneh Torah and classical halakhic sources, free online.