2 Corinthians 10:10

Context
10:10 because some say, “His letters are weighty and forceful, but his physical presence is weak ¹  and his speech is of no account.” ² 

2 Corinthians 12:10

Context
12:10 Therefore I am content with ³  weaknesses, with insults, with troubles, with persecutions and difficulties ⁴  for the sake of Christ, for whenever I am weak, then I am strong.

2 Corinthians 13:3

Context
13:3 since you are demanding proof that Christ is speaking through me. He ⁵  is not weak toward you but is powerful among you.

2 Corinthians 13:9

Context
13:9 For we rejoice whenever we are weak, but you are strong. And we pray for this: that you may become fully qualified. ⁶