Muhammad bin Mansur bin Da'ud محمد بن منصور بن داود الطوسي · The Book of Zakah

"The Messenger of Allah said: '(On the Day of Resurrection) camels will come to their owner in the best state of health that they ever had (in this world) and if he did not pay what was due on them, they will trample him with their hooves. Sheep willcome to their owner in the best state of health that they ever had (in this world) and if he did not pay what was due on them, they will trample him…

"Umar said: 'The Messenger of Allah enjoined Sadaqah and it was said that Ibn Jamil, Khalid bin Al-Walid and 'Abbas bin 'Abdul-Muttalib had withheld some. The Messenger of Allah said: What is the matter with Ibn Jamil? Was he not poor then Allah made him rich? As for Khalid bin Al-Walid, you are being unfair to Khalid, for he is saving his shields and weapons for the sake of Allah. As for Al-Abbas bin 'Abdul-Muttalib, the paternal uncle of the…

"The Muslim does not have to pay Sadaqah on his slave or his horse."

Ibn 'Abbas said concerning Sadaqatul-Fitr. "A Sa' of wheat, or a Sa' of dates, or Sa of barley, or a Sa' of rye." (Sahih Mawquf)

"A man said: 'O Messenger of Allah, which kind of charity is best? He said: 'Giving charity when you are in good health, and feeling stingy, hoping for a long life and fearing poverty."'