Translation:

117. If anyone invokes besides Allah any other god he has no authority therefor; and his reckoning will be only with his Lord! And verily the Unbelievers will fail to win through!

Notes (Tafseer)

2951. Not with any one else whatever, as Allah is the Eternal Reality. If men, out of the figments of their imagination, fancy other gods, they will be rudely undeceived. And Allah is Lord, i.e., our Cherisher as well as our Creator. In spite of all our shortcomings and our rebellions, He will forgive us if we go to Him not on our merits but on His grace.

2952. See the same word used in describing the contrast with the Believers, in the first verse of this Sura. Righteousness must win and all opposition to it must fail. Thus the circle of the argument is completed.