The Prophet (ﷺ) employed a man from the tribe of Al-Azd named Ibn Lutbiyyah as collector of Zakat. When the employee returned (with the collections) he said: "(O Prophet (ﷺ)!) This is for you and this is mine because it was presented to me as gift." Messenger of Allah (ﷺ) rose to the pulpit and praised Allah and extolled Him. Then he said, "I employ a man to do a job and he comes and says: 'This is for you and this has been presented to me as gift'? Why did he not remain in the house of his father or the house of his mother and see whether gifts will be given to him or not? By Allah in Whose Hand is the life of Muhammad, if any one of you took anything wrongfully, he will bring it on the Day of Resurrection, carrying it on (his back), I will not recognize anyone of you, on the Day of Resurrection with a grunting camel, or a bellowing cow, or a bleating ewe." Then he raised his hands till we could see the whiteness of his armpits. Then he said thrice, ''O Allah ! have I conveyed (Your Commandments)".

[Al-Bukhari and Muslim].