Verse of Quran

 أُوْلَئِكَ الَّذِينَ أَنْعَمَ اللَّهُ عَلَيْهِمْ.

"Those are the individuals upon whom Allah has bestowed His blessings…" (Surah Maryam 19:58)

Sulaiman Dailami recounted an encounter in the presence of Imam Sadiq (a.s.). Abu Baseer, a devoted companion, entered breathlessly and, when questioned by the Imam, expressed his frailty and proximity to death, uncertain about his fate in the hereafter. The Imam responded, "Why do you speak in such a manner, O Aba Muhammad?" Abu Baseer replied, "Why should I not, my lord? Allah has mentioned us in the Quran."

The Imam explained that in the verse, 'prophets' signifies the Holy Prophet (S), 'the truthful' represents them, and 'the good' refers to all Shias. The Imam reassured him, saying, "You may retain the name 'good,' as that is how Allah has named you."

Kulaini narrates through reliable sources that Imam Baqir (a.s.) advised, "Assist me through piety. Those of you who meet Allah with piety will find salvation and closeness to Allah, as Allah states: 'And whoever obeys Allah and the Apostle…' The Apostle is from us, as are the truthful, martyrs, and pious. It is incumbent upon Allah to gather our Shias and friends with the prophets, the truthful, the martyrs, and the pious."

A tradition in Khisal attributes the Prophet (S) with saying, "There are three 'truthful' ones: Ali Ibne Abi Talib, Habib Najjar, and the believer from the people of Pharaoh."

In Uyoon Akhbar Ridha, it is narrated that the Holy Prophet (S) stated, "In every Ummah, there is one 'truthful' (Siddiq) and one 'discriminator' (Farooq), and in this Ummah, Ali Ibne Abi Talib (a.s.) is both the 'truthful' and the 'discriminator.'"

Ali Ibne Ibrahim relates that 'prophets' signify the Holy Prophet (S), 'truthful' is Ali Ibne Abi Talib (a.s.), 'martyrs' are Hasan and Husain (a.s.), and 'good' denotes the other holy Imams (a.s.). 

"...and a goodly company are they…" represents the Qaem Aale Muhammad (Imam Mahdi).

Ibne Mahyar cites Abu Ayyub Ansari as stating that the three 'truthful' individuals are Hizqeel, the believer from the people of Pharaoh, Habib Najjar, and Ali Ibne Abi Talib (a.s.), who is the greatest among them.

Imam Sadiq (a.s.) once recounted an encounter with an angel having twenty heads who declared the Prophet to be the most esteemed before Allah among all creatures. The angel's name was Mahmud, and it was inscribed between his shoulders: "There is no god but Allah, Muhammad is the messenger of Allah, and Ali is the greatest truthful (Siddiq-e-Akbar)." When asked, the angel revealed that this inscription had been there for ten thousand years before Allah created Adam.