It is narrated from Abu Ishaq: I heard Wahb bin Jabir say: I was present with Abdullah bin Amr bin al-As (may Allah be pleased with them both) in Bayt al-Maqdis, and a freed slave of his came to him and said: I intend to stay here for the month of Ramadan. Abdullah (may Allah be pleased with them both) said to him: Have you left provisions for your family? He said: No. He (may Allah be pleased with them both) said: Then do not stay here; go back and arrange provisions for them, for I heard the Messenger of Allah (peace and blessings be upon him) say: "It is sin enough for a man that he neglects those whom he is responsible for feeding."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الرضاع / 15694