Berean Study Bible
In fact, we rejoice when we are weak but you are strong, and our prayer is for your perfection.

King James Bible
For we are glad, when we are weak, and ye are strong: and this also we wish, even your perfection.

American Standard Version
For we rejoice, when we are weak, and ye are strong: this we also pray for, even your perfecting.

Darby Bible Translation
For we rejoice when we may be weak and ye may be powerful. But this also we pray for, your perfecting.

Douay-Rheims Bible
For we rejoice that we are weak, and you are strong. This also we pray for, your perfection.

English Revised Version
For we rejoice, when we are weak, and ye are strong: this we also pray for, even your perfecting.

Young's Literal Translation
for we rejoice when we may be infirm, and ye may be powerful; and this also we pray for -- your perfection!