Book 51, Hadith 61

Narrated Abu Huraira:Allah's Messenger (ﷺ) said, "What a good Maniha (the she-camel which has recently given birth and which gives profuse milk) is, and (what a good Maniha) (the sheep which gives profuse milk, a bowl in the morning and another in the evening) is!" Narrated Malik: Maniha is a good deed of charity