1 Peter 1:14–16

Peter cites what is written: be holy in all your conduct, for I am holy

14As children of obedience, not conforming yourselves to the desires you had formerly in your ignorance,

15but as the one who called you is holy, you also be holy in all your conduct,

16because it is written, You shall be holy, because I am holy.

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In its context

12To them it was revealed that not for themselves but for you they were serving these things which have now been announced to you through those who proclaimed the good news to you by the Holy Spirit sent from heaven, things into which angels long to look intently.

13Therefore, girding up the loins of your mind, being sober, set your hope completely on the grace being brought to you at the revelation of Jesus the Messiah.

…

17And if you call on as Father the one who judges without partiality according to each one’s work, conduct yourselves in fear during the time of your pilgrimage,

18knowing that you were redeemed not with perishable things, silver or gold, from your futile conduct inherited from your fathers,

Read all of 1 Peter 1

Its words in the original

Holiness