2 Corinthians 12:9-10

9But he said to me, aMy grace is sufficient for you, for bmy power is made perfect in weakness.” Therefore I will boast all the more gladly of my weaknesses, so that cthe power of Christ may rest upon me. 10 dFor the sake of Christ, then, eI am content with weaknesses, insults, hardships, persecutions, and calamities. For fwhen I am weak, then I am strong.

2 Corinthians 13:3

3since you seek proof that Christ gis speaking in me. He is not weak in dealing with you, but his powerful among you.
Copyright information for ESV