Musannaf Ibn Abi Shayba 30:27

Rawwad ibn al-Jarrah narrated to us, from al-Awza'i, from Isma'il ibn 'Ubayd Allah, from 'Ali ibn 'Abd Allah ibn 'Abbas, regarding His saying: "And your Lord will give you, and you will be satisfied" (93:5). He said: "A thousand palaces of white pearl, their soil is musk, and in them is what makes them suitable."