My father narrated to us. He said: Ahmad b. Idris narrated to us from Muhammad b. Ahmad from Muhammad b. Hassan from Isma`il b. Mehran from al-Hasan b. `Ali b. Abi Hamza al-Bata'ini from al-Husayn b. Abi'l `Alaa' from Abi `Ubayda al-Kadha' from Abi Ja`far al-Baqir . He said:

Whoever recites the mu`awadhatayn and qul huwallahu ahad in witr, it is said to him: "O servant of Allah! Be glad, for Allah has accepted your witr."