In Christ, by the faith of Jesus, the believer keeps the commandments of God, which is the righteousness of God. Thus the keeping of the commandments of God is the free gift of His righteousness received solely by the faith of Jesus - the very faith that Jesus excercised on earth to overcome the world.
This is an unforgetable 'Collection' on the faith of Jesus!
Having "faith in Jesus," is not the same as having the "faith of Jesus."
"Here are those who have endured to the end; who keep the commandments of God and the faith of Jesus." Revelation 14.12