“Once we spoke to him (the Imam) about al-Kufah and of taxes levied and where his family has moved. He (the Imam) said, ‘Those who willingly accepted Islam their land was left in their hands. One out of ten is received from them for what is watered from the sky and canals. There is one out of twenty for what is watered by means of drawing water of what they have revived. What is not revived is under the authority of Imam who contracts with those who revive it. The share of the Muslims on the contractors is one out of ten or one out of twenty and Zakat is not due on what is less than twenty Awsaq. Whatever land is taken by the sword (Armed forces), it belong to the Imam who contracts it with whomever he deems proper, just as the Messenger of Allah did with the land of Khaybar and its black and white, its land and gardens. People would say land and palm trees are not proper for contract. The Messenger of Allah contracted the land of Khaybar and the contractors were to pay one out of ten or one out of twenty.’ He (the Imam) said, ‘People of Ta’if accepted Islam and they were to pay one out of ten or one out of twenty. There is the case of people of Makkah, where the Messenger of Allah entered by force, who became his captives, he set them free. Saying, “Go, you are set free.’””