Sahih Muslim
The Book of Pilgrimage (Kitab Al-Hajj)
Book Number: 007 / Hadith Number: 3173
Abu Sa'id al-Kbudri (Allah be pleased with him) reported that Allah's Messenger (may peace be upon him) said: O Allah, bless us in our sa' and mud and shower with its blessings two other blessings (multiply blessings showerted upon it).