Sayyiduna Ubadah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) sent him to collect zakah and said: "O Abu al-Walid! Keep fearing Allah, lest on the Day of Resurrection you come carrying a camel that is groaning, or a cow that is lowing, or a sheep that is bleating." He said: O Messenger of Allah! Will this really happen? He (peace and blessings be upon him) said: "By the One in whose Hand is my soul! It will certainly be so, except for the one on whom Allah has mercy." He said: By the One who sent you with the truth! I will never do any such work.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7663