1 Corinthians 11:28-29

11:28 A person should examine himself first, and in this way let him eat the bread and drink of the cup. 11:29 For the one who eats and drinks without careful regard for the body eats and drinks judgment against himself.

1 Corinthians 14:4

14:4 The one who speaks in a tongue builds himself up, but the one who prophesies builds up the church.