Sahih Muslim | Book 20 | Chapter 37

Narrated by It has been narrated on the authority of Abu Mas'ud al-Ansari who
It has been narrated on the authority of Abu Mas'ud al-Ansari who said A man brought a muzzled she-camel and said: It is (offered) in the way of Allah. The Messenger of Allah (may peace be upon him) said: For this you will have seven hundred she-camels on the Day of Judgment all of which will be muzzled.

Narrated by A'mash
A similar tradition has been narrated on the authority of al-A'mash.