NET
4 who comforts us in all our troubles so that we may be able to comfort those experiencing any trouble with the comfort with which we ourselves are comforted by God.
Darby
4 who encourages us in all our tribulation, that we may be able to encourage those who are in any tribulation whatever, through the encouragement with which we ourselves are encouraged of God.
KJV
4 Who comforteth us in all our tribulation, that we may be able to comfort them which are in any trouble, by the comfort wherewith we ourselves are comforted of God.