Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) said: O people, fear Allah, and let not heedlessness lead you to seek provision from other than its lawful sources, for I heard the Prophet (peace and blessings be upon him) say: 'Allahumma uhshurni fi zumrat al-masakin, wa la tahshurni fi zumrat al-aghniya', fa inna ashqa al-ashqiya' man ijtama'a 'alayhi faqr al-dunya wa 'adhab al-akhirah' (O Allah, raise me among the ranks of the needy, and do not raise me with the rich; indeed the most wretched of all is the one upon whom the poverty of this world and the punishment of the Hereafter are combined).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الصدقات / 13154