7-98 Muhammad ibn Ahmad al-Baghdady al-Var’raq narrated that Ali ibn Muhammad ibn Ja’far ibn Anbasat - the servant of Ar-Rashid quoted Darim ibn Qabaysat narrated that Ali ibn Musa al-Ridha (MGB), on the authority of his father Musa ibn Ja’far al-Kadhim (MGB), on the authority of his father Ja’far ibn Muhammad as-Sadiq (MGB), on the authority of his father Muhammad ibn Ali al-Baqir (MGB), on the authority of his father Ali ibn al-Hussein as-Sajjad (MGB), on the authority of his father Al-Hussein ibn Ali (MGB) that he had heard his father Ali ibn Abi Talib (MGB) say,

“God’s Prophet (MGB) prayed and said, ‘O God! Please bless Saturday mornings and Thursday mornings for my nation.”