Charity in Islam is a Religious and Social obligation

2:1 I, Allah, am the best Knower.
2:2 This Book, there is no doubt in it, is a guide to those who keep their duty,
2:3 Who believe in the Unseen and keep up prayer and spend out of what We have given them

The most frequently recurring words for charity in the Qur’an are infaaq, which means spending benevolently; ihsaan, which means the doing of good; Zakaat, which means growth and purification and sadaqah, which is derived from the root sidq, meaning truth, and comes to signify a charitable deed. The very words to denote charitable deeds are an indication of the broadness of its conception.