The man Elkanah, and all his house, went up to offer to Yahweh the yearly sacrifice, and his vow.
The bull mentioned in  1 Samuel 1:25 was the sacrifice connected with the presentation of Samuel to the Lord - whereas the other two bulls were those brought on the previous two years during the interval when Samuel was being weaned.  These were facts which the author did not think it needful to mention, simply because it is implied from  1 Samuel 1:3, and from the provisions of the Law of Moses.[16]