It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him), he said: I heard the Messenger of Allah (peace and blessings of Allah be upon him) say: "Allah, the Mighty and Majestic, divided mercy into one hundred parts. He kept ninety-nine parts with Himself and sent down one part to the earth. It is from this one part that the creation shows mercy to one another, so much so that a mare lifts its hoof away from its young lest it should harm it."
Hadith Referenceالادب المفرد / كتاب / 100
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه البخاري ، الأدب ، باب جعل الله الرحمة مائة جزه : 6000 و مسلم : 2752 و الترمذي : 3541 و ابن ماجه : 4293»