as you help us by your prayers. Then many will give thanks on our behalf for the favor shown us in answer to their prayers.
KJV
Ye also helping together by prayer for us, that for the gift [bestowed] upon us by the means of many persons thanks may be given by many on our behalf.
ASV
ye also helping together on our behalf by your supplication; that, for the gift bestowed upon us by means of many, thanks may be given by many persons on our behalf.