What is the ruling on adding to the response to the salam, and on adding “and His forgiveness” and “and His pleasure”?

Question : To proceed: Honorable Shaykh, a questioner says: What is your ruling on adding “and His forgiveness” or “and may His blessings be upon him” to the one who said “As-salamu alaykum wa rahmatullah,” adding it to “Wa alaykum as-salam wa rahmatullah wa barakatuh”?

Answer : What is established in the Sunnah is good. If one limits himself to saying “Wa alaykum as-salam wa rahmatullah wa barakatuh,” that is better than adding to it. If he adds “and His forgiveness” and “and His pleasure,” I do not see any prohibition in this, as long as the person does not believe that this is a correction of what the Sunnah brought.