'Horns of the Altar' in the Bible

Take some of the blood of the bull, put it on the horns of the altar with your finger, and pour out the rest of the blood at the base of the altar.

So Moses slaughtered it, took the blood, and applied some of it at the horns of the altar and around it with his fingers, thus purifying the altar. Then he poured the blood at the base of the altar, thereby sanctifying it as a means to make atonement with it.

Next, Aaron's sons brought the blood to him and he dipped his fingers in the blood and placed it on the horns of the altar. As to the rest of the blood, he poured it at the base of the altar.

When he goes to the altar in the LORD's presence to make atonement for himself, he is to take some of the blood from the bull and the male goat, place it around the horns of the altar,

Afraid of Solomon, Adonijah also jumped up and headed straight for the horns of the altar.

"Hey look!" somebody informed Solomon. "Adonijah is terrified of King Solomon! He's gone out, grabbed hold of the horns of the altar, and now he's begging King Solomon, "Swear to me that you won't put your servant to death with a sword!'"

When Joab learned what had happened, he ran to the LORD's tent and grabbed hold of the horns of the altar, since Joab had supported Adonijah (though he had not supported Absalom).

You are to take some of its blood and put it on the four horns of the altar, on the four corners of its ledge, and on the border that surrounds it, thus cleansing it and making an atonement for it.

"because on that day I will lay out the charges against Israel. I will also bring judgment upon the altars of Bethel; the horns of the altar will be cut off and will fall to the ground.