On the Day of Resurrection those Animals will tread him under their Hooves

576. Narrated Aboo Dhar (radhi Allaahu anhu) : Once I went to the Prophet (Sallallaahu Alaihi Wasallam) and he said,

“By Allaah in Whose Hands my life is”, or probably said, “By Allaah except Whom none has has the right to be worshipped), whoever had camels or cows or sheep and did not  pay their Zakaat, those animals will be brought on the Day of Resurrection far bigger and fatter than before and they will tread him under their hooves, and (those animals will come in circle) when the last does its turn, the first will start again and this punishment will go on till Allaah (Subhahanu wata’alaa) has finished the judgment amongst the people.”

[Saheeh Al-Bukhaari, Hadeeth No. 539, Vol. 2]

Source : The Book Of Zakat : Chapter 8   – The gravity of punishment for the one who does not pay the Zakaat. Al-Lulu Wal-Marjan, Compiled by : Fuwad Abdul-Baqi, Translated by : Dr. Muhammad Muhsin Khan