Shmuel Alef 26:19

Now therefore, let adoni HaMelech hear the devarim of his eved. If HASHEM have stirred thee up against me, let Him accept a minchah; but if they be bnei adam, cursed be they before HASHEM; for they have driven me out this day from abiding in the nachalah of HASHEM, saying, Go, serve elohim acharim.