Musnad Ahmad 28:112

Yahya ibn Hammad narrated to us, Abu 'Awanah narrated to us, from 'Ata' ibn al-Sa'ib, from his father, from 'Abdullah ibn 'Amr, that he narrated to them from the Prophet, peace and blessings of Allah be upon him, that he said: "A guest stayed with a man from the Children of Israel, and in his house was a pregnant female dog. The dog said: 'By Allah, I will not bark at the guest of my household.' He said: Then her puppies howled inside her belly. He said: It was said, 'What is this?' He said: So Allah, the Mighty and Majestic, revealed to a man among them: 'This is an example of a nation that will be after you; its foolish ones will overpower its forbearing ones.'"