Most Relevant Verses
Aaron shall make atonement upon the horns of it once a year; with the blood of the sin offering of atonement once in the year shall he make atonement upon and for it throughout your generations. It is most holy to the Lord.
But into the second [division of the tabernacle] none but the high priest goes, and he only once a year, and never without taking a sacrifice of blood with him, which he offers for himself and for the errors and sins of ignorance and thoughtlessness which the people have committed.
For since the Law has merely a rude outline (foreshadowing) of the good things to come -- "instead of fully expressing those things -- "it can never by offering the same sacrifices continually year after year make perfect those who approach [its altars].
And Elkanah and all his house went up to offer to the Lord the yearly sacrifice and pay his vow.
Moreover, his mother made him a little robe and brought it to him from year to year when she came up with her husband to offer the yearly sacrifice.
And everyone who is left of all the nations which came against Jerusalem shall even go up from year to year to worship the King, the Lord of hosts, and to keep the Feast of Tabernacles or Booths.