וַ֠יָּבֹא אֶל־גִּדְר֨וֹת הַצֹּ֤אן עַל־הַדֶּ֙רֶךְ֙ וְשָׁ֣ם מְעָרָ֔ה וַיָּבֹ֥א שָׁא֖וּל לְהָסֵ֣ךְ אֶת־רַגְלָ֑יו וְדָוִד֙ וַאֲנָשָׁ֔יו בְּיַרְכְּתֵ֥י הַמְּעָרָ֖ה יֹשְׁבִֽים׃
At dumating siya sa mga kulungan ng tupa sa tabi ng daan, at doon ay may isang yungib; at pumasok si Saul upang magbawas. At si David at ang kanyang mga tauhan ay nakaupo sa kaloob-looban ng yungib.
Rashi
To relieve himself. To defecate.1Maseches Yevamos 103a states that the term ‘לְהָסֵךְ אֶת דַגְלָיו’ is a euphamistic expression. Because of his extreme modesty, Shaul covered himself like a succah [Maseches Berachos 62b], with his clothing. The word לְהָסֵךְ originates from סִכוּדְ, which means covered.—Radak.