Musannaf Ibn Abi Shayba 30:9

Waki’ narrated to us, from Sufyan, from Salamah ibn Kuhayl, from al-Hasan al-‘Urani, from Hudhayl ibn Shurahbil, from ‘Abdullah regarding His saying: "The Lote Tree of the Utmost Boundary" (Sidrat al-Muntaha). He said: "The center of Paradise," meaning its middle. Upon it are the surpluses of silk and brocade.