Hammad bin Salama حماد بن سلمة · The Book of Zakah

"I heard the Messenger of Allah say: 'Any man who has camels and does not pay what is due on them in its Najdah or its Risl mean?' He said: 'In times of hardship or in times of ease; they will come on the Day of Resurrection as energetic, fat and lively as they ever were. He will be laid face down in a flat arena for them and they will trample him with their hooves. When the last of…

That the Messenger of Allah sent him to Yemen, and he commanded him to take a Dinar, or its equivalent in Maafr, from each person who had reached the age of puberty. And with regard to cattle, from every thirty a male or female Tabi '(two-year-old). And from every forty a Musinnah (three-year-old). (Daif)