Sahih Bukhari

Narrated Isma`il bin Abi Khalid:I heard Abu Juhaifa saying, ""I saw the Prophet, and Al-Hasan bin `Ali resembled him."" I said to Abu- Juhaifa, ""Describe him for me."" He said, ""He was white and his beard was black with some white hair. He promised to give us 13 young she-camels, but he expired before we could get them