It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) passed by a man who was saying: O Arham al-Rahimin (Most Merciful of those who show mercy)! The Messenger of Allah (peace and blessings be upon him) said to him: "Ask (for whatever you wish), for Allah has looked upon you (with favour)." Fadl bin Isa is al-Raqashi, and I fear that his paternal uncle may be Yazid bin Aban; however, I have found a supporting narration (shahid) for this hadith in the hadith of Sayyiduna Abu Umamah al-Bahili (may Allah be pleased with him).

It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Allah has an angel appointed over the one who says 'Ya Arham al-Rahimin' (O Most Merciful of those who show mercy). Whoever says it three times, that angel says to him: Indeed, the Most Merciful of those who show mercy has turned towards you, so now ask for whatever you wish."