Matthew Poole and continuators on 1 Samuel 1:24

24 ¶ And when she had weaned him, she took him up with her, with three bullocks , and one ephah of flour , and a bottle of wine , and brought him unto the house of the LORD in Shiloh: and the child was young.

Either, First, One to be offered at that time: the other two presented to the Priest, whether for his own use, or to be offered afterwards, as he saw fit. Or, Secondly, One for a burnt-offering, the Second for a sin-offering, the Third for a peace-offering; of which they might all Feast together; for all these sorts seem expedient for this work and time.

For the meat-offerings belonging to the principal Sacrifices, which to each Bullock were three tenth-deals, or three tenth parts of an Ephah, as appears from Numb. 15. 9. and 28. 12, and so nine Homers, or nine parts of the Ephah were spent, and the tenth part was either a separate meat-offering, or given to the Priest.

For drink-offerings, according to the manner.