Hawzah News Agency – The merciful prophet of Islam (pbuh) says:

الراحِمونَ يَرحَمُهُم الرّحمنُ تباركَ وتعالى‏، اِرحَمُوا مَن في الأرضِ يَرحَمْكُم مَن في السماءِ.

'The All-Merciful, Blessed and most High, has mercy on those who are merciful (towards others). Have mercy on the dwellers of the earth and the [Lord of the] Heavens will have mercy on you.'

Source: Kanz al-Ummal, no. 5969