Sahih Muslim Book - 49, Hadith - 6977

حَدَّثَنَا ابْنُ نُمَيْرٍ حَدَّثَنَا أَبُو مُعَاوِيَةَ عَنْ دَاوُدَ بْنِ أَبِى هِنْدٍ عَنْ أَبِى عُثْمَانَ عَنْ سَلْمَانَ قَالَ قَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « إِنَّ اللَّهَ خَلَقَ يَوْمَ خَلَقَ السَّمَوَاتِ وَالأَرْضَ مِائَةَ رَحْمَةٍ كُلُّ رَحْمَةٍ طِبَاقَ مَا بَيْنَ السَّمَاءِ وَالأَرْضِ فَجَعَلَ مِنْهَا فِى الأَرْضِ رَحْمَةً فَبِهَا تَعْطِفُ الْوَالِدَةُ عَلَى وَلَدِهَا وَالْوَحْشُ وَالطَّيْرُ بَعْضُهَا عَلَى بَعْضٍ فَإِذَا كَانَ يَوْمُ الْقِيَامَةِ أَكْمَلَهَا بِهَذِهِ الرَّحْمَةِ ».

It was narrated that Salman said: "The Messenger of Allah (s.a.w) said: 'On the day that Allah created the heavens and the earth, He created one hundred (parts of) mercy, each of which is as great as the distance between the heavens and the earth, and He put one part of that mercy on earth, because of which a mother shows compassion to her child and animals and birds show compassion to one another. When the Day of Resurrection comes, that mercy will complete the number (again)."'