Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: I heard the Prophet (peace and blessings of Allah be upon him) say: "Allah Almighty has made one hundred parts of mercy. Out of them, He has kept ninety-nine parts with Himself and sent down one part to the earth. Because of this one part, the creation shows mercy to one another, to the extent that even an animal lifts its hoof away from its young one, fearing that it might harm it."
Hadith Referenceصحیح ابن حبان / كتاب التاريخ / 6148
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط مسلم