The merciful are shown mercy by the most Merciful one
Abdullah bin 'Amr narrated that the Messenger of Allah, may the peace and blessings of Allah be upon him, said:
"The merciful are shown mercy by the most Merciful one. Be merciful on the earth, and you will be shown mercy from He Who is above the heavens. The womb is named after the most Merciful one, so whoever maintains it, Allah will maintain him, and whoever severs it, Allah will sever him."
This Hadeeth is overflowing with benevolence, kindness, and affection from the heart of this Prophet, may the peace and blessings of Allah be upon him. Every one receives his wise commandments and precious advice with good acceptance, and listens attentively to every word that comes out of his pure mouth, to understand and reflect upon its meaning so that he relies upon Allah to apply all that he heard.
Muhammad, may the peace and blessings of Allah be upon him - as we know and believe – is a wise, merciful and compassionate messenger. The springs of mercy have burst out of his pure heart. Then the hearts of the believers were enlightened, and so it was their habit to have mercy among themselves under the umbrella of faith as brothers who love each other for the sake of Allah. They gather on the love of Allah, blessed and exalted is He - and leave each other on the same love.
They were unmatched in terms of applying this law with which the Prophet was sent.