Surah 69. Al-Haqqah, Ayah 45

I.e., deprived him of all ability to act - the "right hand" symbolizing power.

The right hand is the hand of power and action. Any one who is seized by his right hand is prevented from acting as he wishes or carrying out his purpose. The argument is that if an impostor were to arise, he would soon be found out. He could not carry out his fraud indefinitely. But the prophets of Allah, however much they are persecuted, gain more and more power every day, as did the holy Prophet, whose truth, earnestness, sincerity, and love for all, were recognised as his life unfolded itself.