History of the Church, Joseph Smith 5:326
At the close of the meeting…I remarked that the hundred and forty-four thousand sealed are the priests who should be anointed to administer in the daily sacrifice.
Scriptural Teachings of the Prophet Joseph Smith :172
It will be necessary here to make a few observations on the doctrine set forth in the above quotation, and it is generally supposed that sacrifice was entirely done away when the Great Sacrifice [i.e.,] the sacrifice of the Lord Jesus was offered up, and that there will be no necessity for the ordinance of sacrifice in future; but those who assert this are certainly not acquainted with the duties, privileges and authority of the Priesthood, or with the Prophets. The offering of sacrifice has ever been connected and forms a part of the duties of the Priesthood. It began with the Priesthood, and will be continued until after the coming of Christ, from generation to generation. We frequently have mention made of the offering of sacrifice by the servants of the Most High in ancient days, prior to the law of Moses; which ordinances will be continued when the Priesthood is restored with all its authority, power and blessings.