Does he add to the salam by saying "and Allah's mercy and blessings"?

Question : This is from the research on the salam. Does he add to it by saying "Peace be upon you, and Allah's mercy and blessings"?

Answer : This is a point of disagreement among the scholars. Some said that the best is not to add, and this is the well-known position in the school of Imam Ahmad: not to add to "and Allah's mercy," neither in the first taslim nor in the second. Some scholars held that he adds "and blessings" in the first taslim but not in the second. So he says in the first, "Peace be upon you, and Allah's mercy and blessings," and in the second, "Peace be upon you" only. This is based on a hadith narrated by Abu Dawud, in which al-Hafiz Ibn Hajar said that its chain of narration is authentic.