الكافي- ط الاسلامية, volume 3, page 440

4. Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from Safwan ibn Yahya from Dharih who has said the following: “I once asked abu ‘Abd Allah (a.s.), about nightly optional Salah (prayer) which are missed. Can I perform the compensatory prayer for them during the day? He (the Imam) said, ‘Yes, you can do so, if you are able to bear it.’”

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

5. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn Sinan from ibn Muskan from al-Halabiy who has said the following: “I once asked abu ‘Abd Allah (a.s.), about performing optional Salah (prayer) on the back of camel or stumper. He (the Imam) said, ‘Yes, you can do so as your face is.’ I then asked, ‘Am I required to face al-Qiblah (al-Ka‘bah) when saying Takbir (Allah is great beyond description)? He (the Imam) said, ‘No, you are not required but say Takbir (Allah is great beyond description) as your face is and that is how the Messenger of Allah of had done.’”

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

6. Muhammad ibn ’Isma‘il has narrated from al-Fadl ibn Shadhan from Safwan ibn Yahya from Mansur ibn Hazim from Aban ibn Taghlib who has said the following: “Once abu ‘Abd Allah (a.s.), and I journeyed between Makkah and al-Madinah and he would say, ‘You, however, are young people, thus you delay. I am old so I hurry up.’ He (the Imam) would perform the nightly optional Salah (prayer) in the beginning of the night.”

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

7. Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from Safwan ibn Yahya from Ya’qub ibn Shu’ayb who has said the following: “I once asked abu ’Abd Allah (a.s.), about a man who performs Salah (prayer) on his stumper. He (the Imam) said, ‘He makes gestures for Sujud (prostrations) lower than the gesture for Ruku‘ (bowing down on one’s knees).’ I then asked, ‘Can he perform Salah (prayer) while walking? He (the Imam) said, ‘Yes, but in the form of gestures and make the one for Sujud (prostrations) lower than that for RukuV”

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

8. Ali ibn Ibrahim has narrated from his father from ibn abu ‘ Umayr from ’Abd al- Rahman ibn al-Hajjaj who has said the following: “I once asked abu ‘Abd Allah (a.s.), about a man who performs optional Salah (prayer) in the cities while on the stumper and to whatever direction it faces. He (the Imam) said, ‘Yes, it is not harmful.’”

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