2 Corinthians 10:6; 2 Corinthians 12:10; 2 Corinthians 13:9

6 and we are ready to punish all disobedience, whenever your obedience is complete.
10 Therefore I am well content with weaknesses, with insults, with distresses, with persecutions, with difficulties, for Christ's sake; for when I am weak, then I am strong.
9 For we rejoice when we ourselves are weak but you are strong; this we also pray for, that you be made complete.