Reference for I Samuel 30:15

וַיֹּ֤אמֶר אֵלָיו֙ דָּוִ֔ד הֲתוֹרִדֵ֖נִי אֶל־הַגְּד֣וּד הַזֶּ֑ה וַיֹּ֡אמֶר הִשָּׁבְעָה֩ לִּ֨י בֵֽאלֹהִ֜ים אִם־תְּמִיתֵ֗נִי וְאִם־תַּסְגִּרֵ֙נִי֙ בְּיַד־אֲדֹנִ֔י וְאוֹרִֽדְךָ֖ אֶל־הַגְּד֥וּד הַזֶּֽה׃

And David said to him: ‘Wilt thou bring me down to this troop?’ And he said: ‘Swear unto me by God, that thou wilt neither kill me, nor deliver me up into the hands of my master, and I will bring thee down to this troop.’