Faḍāʾil al-Ashhur al-Thalātha 1, narration 4

Translation

Muḥammad b. Ibrāhīm b. Isḥāq narrated to us, saying that ʿAbd al-ʿAzīz b. Yaḥyā al-Baṣrī narrated to him among others, saying that al-Mughīra b. Muḥammad narrated to him among others, saying that Jābir b. Salama narrated to him among others, saying that Ḥasan b. Ḥusayn narrated to him among others, from ʿUmar al-Sarrāj, [1] from Salām al-Juʿfī, from Abū Jaʿfar, Muḥammad b. ʿAlī (as-d), who said: “Whoever fasts one day of Rajab, whether it be of the month’s first part, in its middle, or at its end, Allāh will mandate upon him Paradise and make him one with us in our degrees [or degree] (of nobility) on the Day of Judgement. Whoever fasts two days of Rajab, it will be said to him: “Start anew, for you have been forgiven for whatever has passed!,” and whoever fasts three days of Rajab, it will be said to him: “You have been forgiven for whatever has passed, and as for what remains, you may intercede for whomever you will, of the sinners from among your brothers and acquaintances [your forgiveness].” Whoever fasts seven days of Rajab will have the seven doors of Hellfire closed to him, and whoever fasts eight days of Rajab will have the eight doors of Heaven opened to him so that he may enter through whichever he wills.”

Translation: Haseeb Hassan — published with the edition, reproduced verbatim.