It is narrated from Sayyiduna Malik bin Amr al-Qushayri (may Allah be pleased with him); he said: I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever lives to see one of his parents and is then not forgiven, may Allah distance him. And whoever takes an orphan (born) of two parents into his food and drink until Allah makes him self-sufficient, Paradise becomes obligatory for him."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 16716