Sunan an-Nasa'i 2995

It was narrated from Muhammad bn Imran Al-Ansari that his father said:"Abdullah bin Umar came to me when I had stopped beneath a large tree on the way to Makkah. He said: 'Why did you stop beneath this tree?' I said: 'Because of its shade.' Abdullah said: 'The Messenger of Allah said: If you are between the two mountains of Mina - and he pointed with his hand toward the east - there is a valley there called As-Surrabah according to the narration of Al-Harith: Called As-Surar - in which there is large tree beneath which seventy prophets were born." (Daif)