1. Al-Husayn b. Muhammad has narrated from Mu’allah b. Muhammad from al-Hasan b. Ali from Hammad b. Uthman who said: I asked Abi Abdillah عليه السلام: "A man who commits a sinful act with a boy, is his sister lawful for him (to marry)?' He (the Imam) said, 'If he made a hole, then no."