1 Corinthians 15:33-34, 58

Do not be misled: “Bad company corrupts good character.” Come back to your senses as you ought, and stop sinning; for there are some who are ignorant of God—I say this to your shame.

Therefore, my dear brothers and sisters, stand firm. Let nothing move you. Always give yourselves fully to the work of the Lord, because you know that your labor in the Lord is not in vain.