II Samuel 1:1 Midrash

וַיְהִ֗י אַֽחֲרֵי֙ מ֣וֹת שָׁא֔וּל וְדָוִ֣ד שָׁ֔ב מֵהַכּ֖וֹת אֶת־הָעֲמָלֵ֑ק וַיֵּ֧שֶׁב דָּוִ֛ד בְּצִקְלָ֖ג יָמִ֥ים שְׁנָֽיִם׃

And it came to pass after the death of Saul, when David was returned from the slaughter of the Amalekites, and David had abode two days in Ziklag;