1 Peter 4:3
For the time past of our life may suffice us to have wrought the will of the Gentiles, when we walked in lasciviousness, lusts, excess of wine, revellings, banquetings, and abominable idolatries:
Leviticus 18:3
After the doings of the land of Egypt, wherein ye dwelt, shall ye not do: and after the doings of the land of Canaan, whither I bring you, shall ye not do: neither shall ye walk in their ordinances.
Peter's catalog of former Gentile practices invokes the Leviticus 18 heathen-practice prohibition as the constitutional framework for the covenant community's separation. The statute established 'after the doings of the nations ye shall not do' as the negative boundary of covenant identity. Peter applies the same Levitical logic to the former life: the lasciviousness, lusts, excess, revellings, and idolatries constitute the 'will of the Gentiles' that the Leviticus 18 statute identified as the prohibited pattern of nations from which the covenant community must separate.