من لا يحضره الفقيه, volume 2, page 29

Hadith.1611 - Imam Ali ibn Musa al-Ridha (as) said: "The Banu Taghlib were reluctant to pay the Jizyah and requested Umar to exempt them. Fearing that they might join the Romans, he made a treaty with them, whereby the Jizyah was removed from their heads, and instead, their charity (Zakat) was doubled. They accepted this arrangement. Thus, they are bound by what they agreed to and accepted until the truth prevails (the rule of justice is established)."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.

Hadith.1612 - Ya'qub ibn Shu'ayb asked him (Imam Jafar ibn Muhammad Al-Sadiq (as)) about the tithes collected from a man: "Can they be counted as part of his Zakat?" Imam (as) replied: "Yes, if he wishes."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.

Hadith.1613 - Al-Sakuni narrated from Ja'far ibn Muhammad, from his forefathers, from Imam Ali ibn Abi Talib (as) who said: "Whatever the tax collector takes from you and places in his container counts as part of your Zakat. However, whatever he does not place in the container should not be counted as part of your Zakat."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.

Hadith.1614 - Sama'ah narrated from Abu Basir, who reported from Abu Abdullah (Imam Jafar ibn Muhammad Al-Sadiq (as)). He said: I asked him, "A man leaves his family with a provision of three thousand dirhams for two years' expenses. Is Zakat due on it?" Imam (as) replied: "If he is present, Zakat is due on it. If he is absent, there is nothing due on it."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.