15-6 Muhammad ibn al-Hassan - may God be pleased with him - narrated that Al-Hassan ibn al-Hussein ibn Abdul Aziz ibn al-Mohtadi quoted Sayf ibn al-Mobarak ibn Yazid - the servant of Abil Hassan Musa (MGB), on the authority of his father Al-Mobarak, on the authority of Abil Hassan (MGB),

“Noah (MGB) boarded his ark on the first day of Rajab.” He continued the rest of the tradition just as in the above tradition. I have included what I have found on the rewards for fasting in the month of Rajab in the book Faza’el Rajab.