Hadrat Abu Hurayrah (Allah be pleased with him) relates that the Noble Prophet (Allah’s Peace and Blessings upon him) said: Allah possesses one hundred mercies. He sent down one mercy to the jinn, human beings, animals and insects; by it, they show compassion and mercy to one another, and by it, animals show compassion to their young. Allah has reserved ninety-nine mercies with which to show mercy to His servants on the Day of Judgment. [Sahih Muslim , Hadith #2754]
This Hadith highlights that love and mercy are the common denominator between humans, jinns, animals and insects. In fact, love and mercy are the languages understood by all in the universe.
The preceding reports should also be understood to strengthen the concept that mercy and love is directly linked to iman. So the more your iman grows, the more your mercy and love will grow and expand. And the more your iman weakens, the less love and mercy will occupy your heart and the more it will be veiled, to the extent that no love or mercy will occupy the heart and it is as if all the iman has receded.
Almighty Allah mentions in Holy Quran:
:قال الله عز وجل یٰۤاَیُّهَا الَّذِیْنَ اٰمَنُوْا مَنْ یَّرْتَدَّ مِنْكُمْ عَنْ دِیْنِهٖ فَسَوْفَ یَاْتِی اللّٰهُ بِقَوْمٍ یُّحِبُّهُمْ وَ یُحِبُّوْنَهٗۤ ۙ ٌ
Which means: (O’ believers whosoever among you apostates and reject their faith, then Allah will replace you with people whom He loves and they love Him)...(al-Ma’idah, 5 : 54)
Reflect on this beautiful Qur’anic principle that faith and love exist together or diminish together. This is the reason that Ibn Tülün related the terrifying statement of one of the people of knowledge: “So whoever has mercy removed from his heart, it is feared that they will not be resurrected among the Ummah of the Prophet (Allah’s Peace and Blessings upon him)!”

POINTS OF BENEFIT
1. This report highlights that all the mercy that exists in creation since the beginning of time until the Day of Judgment consists entirely of only one portion of Allah’s Mercy out of the one hundred portions of mercy that Allah has reserved for His servants on the Day of Judgment.
2. The Hadith points to the fact that the creation will be in awe of Allah’s mercy awaiting them in the hereafter.
3. This report highlights that mercy is embedded in the entire creation including the animal kingdom, and that mercy and love is a language utilized and understood by all.
Reference :- Forty Hadith on Mercy and those who show Mercy – Shaykh Dr Muhammad Bin Yahya al-Ninowy

