Imam Sadiq (peace be upon him) Abu Bakr Hadhrami narrated that Imam Sadiq (peace be upon him) said: “Whenever you have a need, recite the Muthani and another Surah, and pray two rak’ahs and supplicate to God.” I said: “May God be pleased with you, what is the Muthani?” He said: “It is Al-Fatihah Al-Kitab; In the name of Allah, the Most Gracious, the Most Merciful, praise be to Allah, Lord of the Worlds.”

Tafsir Ahlul Bayt (a.s.) Vol. 1, p. 12 Mustadrak al-Wasayl, Vol. 4, p. 165/ Bihar al-Anwar, Vol. 82, p. 20/ Bihar al-Anwar, Vol. 89, p. 236

The Prophet (s.a.w.s.) should know that whoever recites this Surah with the belief in the Wilayat of Muhammad (s.a.w.s.) and his pure family, and obeys its command and believes in its outward and inward aspects, Allah Almighty will grant him a reward greater than the world and all its wealth and goodness for every word of it; and whoever listens to the person who recites this Surah, He will give him one-third of the reward of the reciter. So, take advantage of this good and blessing that has been placed at your disposal as much as you can, for it is a spoil; lest its opportunity pass and its regret remain in your hearts.

Tafsir Ahl al-Bayt, peace be upon them, Vol. 1, p. 14, Bihar al-Anwar, vol. 89, p. 227/ Amali Lal-Sadooq, p. 175; Faye: "I am the classes of property ... until the end" omitted / Al-Imam al-Askari, p. 29; Faye: "The whole unit minus the best ... until the end" deleted / Noor al-Saqlain / Al-Barhan