Norouz from Imam Sadiq's point of view
Allameh Majlesi in his book called "Zad al Ma'ad", had mentioned the narrative of Mo'alla Bin Khonays that Imam Jafar Sadiq had sworn by Ka'ba on the excellence of Norouz. He had also interpreted this feast and explained its importance:
"In this feast, God the Almighty had asked the ghosts of the servants (like Alast Day) to consider God as the unique creator and never consider any counterpart for him. This is the first day of sunrise, the blowing of winds and growing of the plants. On this day Gabriel had granted the holy prophet with the divine revelations
and his mission started on this day as well and again he smashed the idols of the pagans.Norouz is the day of Ghadir
(18th of Zul Hijjat), the day of Imam Ali's Imamate along with God's decree. Again, on this day the Holy Prophet ordered his followers to greet Imam Ali while, using the phrase "Greetings upon thee o' Amir ul mo'menin". Besides; Imam Ali came to caliphate, as the people wanted him to be. This day will be the day of Imam Mahdi's appearance
and his return to this world. Imam Ja'far Sadiq explained the special deeds of the Norouz in this way:
"On Norouz, one should do religious bathing (Qosl) and put the cleanest clothes of his on and use the best perfume. On this day one should be fasting and after saying the routine prayers along with the supererogation, should say the 4-rak'at prayer. In the first rak'at after Hamd one should say "Al Qadr" Sura for ten times and in the second rak'at "Al Kaferoon" Sura for ten times, in the third "Tohid" Sura for ten times and in the fourth after "Hamd" Sura, ten times "Al Falaq" Sura and "Nas" Sura for ten times and after the praying, should prostrate as the sign of appreciation.