الكافي- ط الاسلامية, volume 5, page 540

1. Al-Husayn from Muhammad has narrated from Mu’alla ibn Muhammad from al-Husayn ibn Ali from Aban from certain persons of his people who said: “This is concerning my question before abu ‘Abdillah (a.s.), about penetrating women in their rear. He (the Imam) said, ‘She is a [means of] pleasure for you, so don't abuse her.’”

Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.

2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ali ibn al-Hakam from who has said, ‘I heard Safwan ibn Yahya who has said the following: “I once said to al-Rida’ (a.s.), that one of his followers has asked me to ask you a question in which he feels shy and intimidated. He (the Imam) asked, ‘What is the question?’ I asked, ‘Can a man come to his wife in her anus?’ He (the Imam) said, ‘It is up to him.’ I then asked, ‘Do you do so?’ He (the Imam) said, ‘No, we do not do so.’”

Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.

1. A number of our people have narrated from Ahmad ibn Muhammad from ibn Khalid from al-‘Ala’ ibn Razin from a man who has said the following: “I once asked abu ‘Abd Allah (a.s.), about masturbation. He (the Imam) said, ‘It is of the sinful acts. Going to bed with a slave-girl is better than this.’”

Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.

2. Ahmad ibn Muhammad from has narrated from abu Yahya al-Wasitiy from ‘Isma’il al-Basriy from Zurarah ibn ’A‘yun who has said the following: “I once asked abu ‘Abd Allah (a.s.), about one’s playing to cause his semen to discharge. He (the Imam) said, ‘He is like going to bed with himself and there is no punishment on him (but it is like fornication as regards to sinfulness).”’

Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.

3. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ahmad ibn al-Hassan from ‘Amr ibn Sa‘id Musaddiq ibn Sadaqah from ‘Ammar ibn Musa who has said the following: “About the case of a man who engages in sexual intercourse with animals or causes his semen to discharge, abu ‘Abd Allah (a.s.), has said, ‘Whenever a man causes his semen to discharge in this or that way it is fornication.’”

Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.