The Messenger of Allah ﷺ said, "What an excellent thing thirty camels are. Their finest beasts are used to carry burdens, their gear is lent out, the milk of their abundant milkers is shared, and on the day they come to water they are gathered at their resting places."
حدثنا وكيع عن محمد بن شريك قال حدثنا عطاء
قال رسول الله ﷺ نعم الإبل الثلاثون يحمل على نجيبها وتعير أداتها وتمنح غزيرتها ويجبيها يوم وردها في أعطانها
Its chain of transmission is sahih. The najeeb among camels is the fast and strong one, its most abundant in milk, its greatest in resting places and grazing grounds. The hadith was narrated with different wordings by Ibn Abu Shayba 7/32, Abdul-Razzaq 6859, and Tabarani in Al-Kabir 7/30.