ISB ~ 1 Peter 1 v16

You shall be holy:A recurring mandate from Leviticus (Lev 11:44; 19:2; 20:7).

•Yahweh often demanded holiness from Israel; that is, he bid the people to draw close to him and to shun the vile practices of the Gentiles. Peter’s readers are likewise surrounded by pagans, yet they are urged to serve God in holiness of life.