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)."