Musnad Ahmad 28:522

'Affan narrated to us, Raja' Abu Yahya narrated to us, Musafi' ibn Shaybah narrated to us, [who said]: I heard 'Abdullah ibn 'Amr saying—and he adjured by Allah three times, and placed his fingers in his ears—: I heard the Messenger of Allah, may Allah bless him and grant him peace, saying: "Indeed, the Corner [the Black Stone] and the Station [of Ibrahim] are two rubies from the rubies of Paradise. Allah, the Almighty and Majestic, extinguished their light. And had Allah not extinguished their light, they would have illuminated everything between the East and the West."