Imam Muhammad al-Baqir (as): Whoever intentionally kills a believer, Allah will affirm for him all the sins, and will acquit sins from the one he has killed. This is according to Allah's verse in the Qur'an: "I desire that you earn [the burden of] my sin and your sin, to become one of the inmates of the Fire. Thawāb al-A’māl wa ‘Iqāb al-A’māl