The Messenger of Allah ﷺ said, "On the day Allah created the heavens and the earth, He created one hundred mercies. He placed one of them on earth, by which a mother shows tenderness toward her child, animals show compassion to one another, and birds care for one another. He held back the remaining ninety-nine until the Day of Resurrection. When the Day of Resurrection comes, Allah will complete them with this one mercy."
قال رسول الله ﷺ: خلق الله عز وجل يوم خلق السموات والأرض مائة رحمة، فجعل في الأرض منها رحمة، فيها تعطف الوالدة على ولدها، والبهائم بعضها على بعض والطير، وأخر تسعة وتسعين إلى يوم القيامة، فإذا. كان يوم القيامة أكملها الله بهذه الرحمة.
Ibn Majah (4294), Ahmad (3/55), and Abu Yaala (1098) narrated it through various routes from Amash, from Abu Salih, from Abu Saeed Khudri, who related it. Its chain of transmission is sahih, and Busiri also graded it sahih in Zawaid bin Majah.On this topic, it is also narrated from Jundab bin Abdullah Bajali, who said, a bedouin came, made his camel kneel, then hobbled it, then prayed behind the Messenger of Allah ﷺ. When the Messenger of Allah ﷺ finished praying, the man went to his camel, untied its hobble, mounted it, and called out, "O Allah, have mercy on me and Muhammad, and do not let anyone else share in your mercy toward us." The Messenger of Allah ﷺ said, "Do you think this man is more astray, or his camel? Did you not hear what he said?" They said, "Yes indeed." He said, "You have restricted Allah's mercy, which is vast. Allah created a hundred portions of mercy and sent down one of them, through which creatures show compassion to one another, jinn, humans, and animals alike, while ninety-nine remain with Him. Do you think he is more astray, or his camel?"Ahmad (4/312) narrated it, as did Abu Dawud (4885) in shortened form, Tabarani in Kabir (2/173), and Hakim (1/56), all through various routes from Abdul-Samad bin Abdul-Warith, from his father, from Jareeri, from Abu Abdullah Jashami, from Jundab, who related it. Abu Abdullah Jashami is "unknown," as stated in Taqrib.Hakim narrated it (1/56) through this same route, except that he called him "Abu Abdullah Jasri," and he also narrated it (4/248) through another route from Yazid bin Harun, who was informed by Saeed bin Iyas Jariri, from Abu Abdullah Jasri, with a similar chain. Abu Abdullah Jasri's name was Humayri bin Bashir, and he was known by his kunyah. He was trustworthy, though he narrated mursal reports, as stated in Taqrib. Yazid bin Harun heard from Jareeri after his mind had become confused.