1 Corinthians 3:17

3:17 If someone destroys God’s temple, God will destroy him. For God’s temple is holy, which is what you are.

1 Corinthians 15:33

15:33 Do not be deceived: “Bad company corrupts good morals.” ¹ 

¹ sn A quotation from the poet Menander, Thais 218, which Paul uses in a proverbial sense.