الكافي- ط الاسلامية, volume 3, page 370

11. It is a narration from him (narrator of previous Hadith) by his father from Hammad from Hariz from Zurarah who has said the following: “I once asked abu Ja‘far, Alayhi al-Salam, about sleeping in Masjid. He (the Imam) said, ‘It is not an offense, except two Masjids: Masjid of the Holy prophet and Masjid al-Haram.’ He (the narrator) has said that he (the Imam) would in certain parts of the night hold my hand and move to one side where he would sit and speak in Masjid al-Haram and perhaps sleep and I also sleep. I then spoke to him about it and he (the Imam) said that it is undesirable to sleep in Masjid al-Haram that was in the time of the Messenger of Allah but sleeping in this area is not an offense.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

12. A group has narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from Muhammad ibn Mehran al-Karkhiy from ‘Abd Allah ibn Sinan who has said the following: “I once asked abu ‘Abd Allah, Alayhi al-Salam, about a man who is in Masjid in Salah (prayer) and wants to spit away. He (the Imam) said, ‘He can do it toward his left and if he is not in Salah (prayer); he must not do so in front of al-Qiblah (al-Ka‘bah) but do so toward his left or right sides.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

13. Al-Husayn ibn Muhammad has narrated from ‘Abd Allah ibn ‘Amir from Ali ibn Mahziyar from who has said the following: “I once saw abu Ja‘far, al-Thaniy, Alayhi al-Salam, emit saliva in Masjid al-Haram between al- Yemaniy corner and the Blackstone and did not bury it.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

14. Al-Husayn ibn Muhammad has narrated from in a marfu‘ manner from Ibn Abi ‘Umayr from certain persons of his people who has said the following: “I once said to abu ‘Abd Allah, Alayhi al-Salam, ‘I dislike performing Salah (prayer) in their Masjid.’ He (the Imam) said, ‘You must not dislike it; every Masjid is built on the grave of a prophet or the executor of the will of a prophet who was murdered and that site received a sprinkle of his blood and Allah loved to be spoken of therein. So you can perform obligatory Salah (prayer) therein as well as optional Salah (prayer) and what you need to perform as Qada’ (compensatory prayer).’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.