But actually in Islam, asceticism or renunciation is purely spiritual or mental, not physical, which means that an ascetic of Islam need not renounce the world and sit in seclusion for good. What the Muslim ascetics do is that they live in the world, attend to its affairs, earn a livelihood, having full trust in God and believing that it is not their efforts which bring them bread, but it is through God's grace and kindness that they get what they get. So in Sufism faqr does not means poverty. It means wealth and abundance, because a faqir in the real sense, is an extremely rich person who lives on spiritual and not physical wealth.
Persian poetry is very rich on the subject.