In one variant, "On the day He created the heavens and the earth, Allah Almighty created a hundred mercies, each mercy equal to what is between the heaven and the earth, and He put one mercy on the earth by which a mother has compassion for her child and wild animals and birds for each other. On the Day of Rising, He will perfect them with this mercy."

Riyadh-as-Saliheen by Imam Al-Nawawi, volume 3, hadith number 420 - Sunni Hadith