I've done much worse than drink alcohol after salvation.
But here you go, since you seem to think, like others who have come here before you, that you can live a life of sinless perfection and full submission to God -
Jas 4:17 Therefore to him that knoweth to do good, and doeth it not, to him it is sin.
Is there any time in your Christian life when you have known that it would have been God's will to do one thing, but you did another, or did nothing at all. The Bible says IT IS SIN - DISOBEDIENCE.
You are saved, not sinless.
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