Shmuel Bais 21:2

And HaMelech called the Giv'onim, and said unto them; (now the Giveonim were not of the Bnei Yisroel, but of the remnant of the Emori; and the Bnei Yisroel had sworn unto them; and Sha'ul sought to annihilate them in his kinot (zeal) for the Bnei Yisroel and Yehudah.)