Sahih Muslim
The Book of Fasting (Kitab Al-Sawm)
Book Number: 006 / Hadith Number: 2390
Muhammad b. Sa'd reported on the authority of his father (Sa'd b. Abi Waqqas (Allah be pleased with him) that the Apostle of Allah (may peace be upon him) had said: Tho month is thus and thus, and thus, i. e. ten, ten and nine. This hadith has been narrated by Abu Khalid with the same chain of transmitters.