Yahya related to me from Malik from Muhammad ibn Amr ibn Halhalaad-Dili from Muhammad ibn lmran al-Ansari that his father said thatAbdullah ibn Umar came upon him while he stopped for a rest under atall tree on the road to Makka, and he said, "What has made you stopunder this tall tree?" He replied that he sought it's shade. Abdullahibn Umar said, "Anything besides that?" and he said, "No, that was theonly. reason he stopped for a rest," and Abdullah ibn Umar said, "TheMessenger of Allah, may Allah bless him and grant him peace, said, 'Ifyou are between al-Akhshabayn (which are two mountains) near Mina,'indicating the east with his outspread hand, 'you will find a valleycalled as-Surar with a tree in it beneath which the umbilical cords ofseventy prophets have been cut.' "
USC-MSA web (English) reference: Book 20, Hadith 258
Arabic reference: Book 20, Hadith 955