1 Kings 1:51

1:51 It was told Solomon, saying, Behold, Adonijah fears king Solomon; for, behold, he has laid hold on the horns of the altar, saying, Let king Solomon swear to me first that he will not kill his servant with the sword.
-World English Bible

Other Translation

1:51 And it was told Solomon, saying, Behold, Adonijah feareth king Solomon: for, lo, he hath caught hold on the horns of the altar, saying, Let king Solomon swear unto me to day that he will not slay his servant with the sword.
-King James Version