“Anas said, "The Messenger of Allah, may Allah bless him and grant him peace, was not asked in Islam for anything without giving it. A man came to him and he gave him sheep filling the space between two mountains and he returned to his people saying, 'O people! Become Muslim! Muhammad gives a gift without any fear of poverty.' Even if a man becomes Muslim only out of desire for this world, it is not long before Islam becomes dearer to him than this world and everything in it.”

Source: Wikiquote