1 Peter 1:16

because it is written [Lev. 11:44f], "You shall be holy [i.e., separated from sin] even as I am holy."

1 Peter 2:9

But you people are especially chosen [by God]; you are a royal body of priests; you are a nation especially set apart for God's use; you are a people who belong exclusively to God, that you may express the virtues of the One who called you out of darkness [i.e., of sin and error], and into His marvelous light [i.e., righteousness and truth].

Treasury of Scripture Knowledge

Summary

All the males among the children of Aaron shall eat of it. It shall be a statute for ever in your generations concerning the offerings of the LORD made by fire: every one that toucheth them shall be holy.

Bible References

Every one

1 Peter 1:16
because it is written [Lev. 11:44f], "You shall be holy [i.e., separated from sin] even as I am holy."
1 Peter 2:9
But you people are especially chosen [by God]; you are a royal body of priests; you are a nation especially set apart for God's use; you are a people who belong exclusively to God, that you may express the virtues of the One who called you out of darkness [i.e., of sin and error], and into His marvelous light [i.e., righteousness and truth].