The Imams (a.s.) are the Sings of whom Allah, the Most Holy, the Most High, has spoken in the Holy Quran

Al-Husayn ibn Muhammad al-Ash'ari from MuAlia ibn Muhammad from abu Dawud al- Mustariqq who has said that Dawad al-Jassas who has said that he heard Imam abu 'Abdallah (a.s.) say about the words of Allah, "Through the signs and with the star people do find their way." (16:16) "Star is the Messenger of Allah (s.a) and the signs are the Imams (a.s.)"

H 531, Ch. 17, h 2

Al-Husayn ibn Muhammad has narrated from MuAlia ibn Muhammad from al-Washsha' from Asbat ibn Salim who has said that Haythamm asked Imam abu 'Abdallah (a.s.), while I was there, about the meaning of the words of Allah, "Through the signs and with the star people do find their way." (16:16) The Imams (a.s.) said, "Star is the Messenger of Allah (s.a) and the signs are the Imams (a.s.)"

H 532, Ch. 17, h 3

Al-Husayn ibn Muhammad has narrated from MuAlia ibn Muhammad from al-Washsha' who has said that he asked Imam al-Rida (a.s.) about the meaning of the words of Allah, the Most High, "Through the signs and with the star people do find their way." (16:16) The Imams (a. s.) said, "We are the signs and the messenger of Allah is the star,"