'Bulls' in the Bible

Is there idolatry in Gilead? Certainly its inhabitants will come to nothing! Do they sacrifice bulls in Gilgal? Surely their altars will be like stones heaped up on a plowed field!

Return to the Lord and repent! Say to him: "Completely forgive our iniquity; accept our penitential prayer, that we may offer the praise of our lips as sacrificial bulls.