Addressing al-Mu’alla ibn Khunays, Imam al-Sadiq (عليه السلام) said: On the Nayruz Day (the 21st of March; the new day in the Persian Calendar), bathe yourself, put on the cleanest of your clothes, perfume yourself with the best fragrance you have, and, before everything, you must observe fasting. When you accomplish the supererogatory prayers and offer the Zohr and Asr (obligatory) prayers, pray a four-rakat prayer, each two alone, in the first of which you may recite Surah al-Fātiḥah once and repeat Surah al-Qadr ten times. In the second unit, you recite Surah al-Fātiḥah once and repeat Surah al-Kafirun ten times. In the third, you recite Surah al-Fātiḥah once and repeat Surah al-Tawḥīd ten times. In the fourth, you recite Surah al-Fātiḥah once and repeat Surah al-Nas ten times. After completing this prayer, you may prostrate and say the following:
If you do so, your sins of fifty years will be forgiven. You may repeat the following invocation as many times as possible: