Hazrat Moulana Muhammad Ilyaas (rahmatullahi ‘alaih) once mentioned the following hadeeth:
من لا يرحم لا يرحم ارحموا من في الأرض يرحمكم من في السماء
The one who does not show mercy (to others) will not be shown mercy (by Allah Ta‘ala). Show mercy to those on the earth, and the One in the heavens will show mercy to you.
After mentioning this hadeeth, Moulana (rahimahullah) said:
Unfortunately, people restrict this hadeeth to refer to showing mercy to only those who are suffering from hunger and poverty. Hence, they express sympathy and concern for those who are hungry, thirsty and do not have clothing. However, they do not express sympathy and concern for those Muslims who are deprived of Deen. In other words, people recognize a worldly decline to be a loss, but do not regard a Deeni decline to be a loss. How can we expect Allah Ta‘ala to shower His mercy on us when we do not express any sympathy and concern over the Deeni retrogression of the Muslims?
(Malfoozaat Hazrat Moulana Muhammad Ilyaas (rahmatullahi ‘alaih) pg. 38)