Sahih al-Bukhari 5608
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "The best object of charity is a she-camel which has (newly) given birth and 
gives plenty of milk, or a she-goat which gives plenty of milk; and is given to somebody to utilize its 
milk by milking one bowl in the morning and one in the evening."
حَدَّثَنَا أَبُو الْيَمَانِ، أَخْبَرَنَا شُعَيْبٌ، حَدَّثَنَا أَبُو الزِّنَادِ، عَنْ عَبْدِ الرَّحْمَنِ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏
"‏ نِعْمَ الصَّدَقَةُ اللِّقْحَةُ الصَّفِيُّ مِنْحَةً، وَالشَّاةُ الصَّفِيُّ مِنْحَةً، تَغْدُو بِإِنَاءٍ، وَتَرُوحُ بِآخَرَ ‏"‏‏.‏