تفسير : (we assuredly had taken him) we assuredly had taken revenge against him (by the right hand) by means of truth and proofs; it is also said this means: we assuredly had vehemently taken him.
Jalāl al-Dīn al-Maḥallī
تفسير : we would have assuredly seized him, we would have exacted vengeance [against him], as punishment, by the right hand, by [our] strength and power;
Sahl al-Tustari
تفسير : we would assuredly have seized him by the right hand,that is, we would have ordered for him to be seized by the hand just as is the practice of kings.