Musnad Ahmad 32:650

Yunus narrated to us, Muhammad ibn Ziyad al-Burjami narrated to us, he said: I heard Thabit al-Bunani narrating from Anas ibn Malik, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever has three daughters or three sisters, fears Allah regarding them, and maintains them, he will be with me in Paradise like this," and he gestured with his four fingers.