Sahih Muslim
The Book of Zakat (Kitab Al-Zakat)
Book Number: 005 / Hadith Number: 2226
Abu Huraira reported that the Apostle of Allah (may peace be upon him) forbade (to do certain things) and then he made a mention of certain habits and said: He who gives a she-camel as a gift, for him is the reward (of the gift) both morn- ing and evening-a reward for drinking milk in the morning and a reward for drinking milk in the evening.