The meaning of the saying of the Prophet, Allah’s blessings be upon him and his Family: «The sky has not shadowed upon, nor has the earth carried, anyone with a tongue more truthful than Abu Dharr»

Abu Dharr came one day to the Mosque of Allah’s Messenger (sw) and said: I did not see like I saw yesterday. They said: And what did you see yesterday? He said: I saw the Messenger of Allah (sw) at its door, and then he went out and took by the hand of Ali bin Abi Talib (AS) and they went out to Baqee’.
I kept tracing their tracks until they came to the graves of (the people of) Mecca, and then he turned to the grave of his father and prayer two rak’a next to it, and suddenly, the grave split open, and suddenly, Abdullah was sitting whilst saying: «I testify that there is no god but Allah, and that Muhammed is His servant and Messenger». Then he said to him: Who is your Leader, O father? So he said: What is the Leader, O my son? So he said: This is him, Ali. Then he said: «And that Ali is my Leader». He said: Then return to your garden. Then he turned to the grave of his mother, Amina, and he did what he did at the grave of his father, and suddenly, the grave had split open, and it was her, saying: «I testify that there is no god but Allah, and that you are the Prophet of Allah and His Messenger». Then he said to her: Who is your Leader, O mother? So she said: What is the Divine Authority, O my son? He said: It is him, Ali bin Abi Talib. So she said: «And that Ali is my Leader». Then he said: Return to your hole and garden.
Then they [1] rejected him [2], grabbed hold of him, pulled him and said: O Messenger of Allah, he has lied about you today! Then he said: And what was of that? They said: Indeed, Jundub [3] has spoken about you such-and-such! Then the Prophet (sw) said: The sky has not shadowed upon, nor has the earth carried, anyone with a tongue more truthful than Abu Dharr. Abdul-Salam bin Muhammed said: Then I presented this report upon al-Jahmi, Muhammed bin Abdil-A’la, and he said: Did you not know that the Prophet (sw) said: «Jibra’eel (AS) came to me and said: Indeed, Allah, Exalted and Glorious is He, forbade the Fire for the loins from which you descended, womb that carried you, breast that breastfed you and home that cared for you»?

I said to Abu 'Abdillah (al-Sadiq) (as): Did Rasulullah (sw) not say with regards to Abu Dharr (ra): «The sky has not shadowed upon nor has the earth carried anyone with a tongue more truthful than Abu Dharr»? He said: "Yes." (The man) asked: "Then what about Rasulullah (sw) and Amir al-Mu'minin (as)? And what about al-Hasan (as) and al-Hussain (as)?". He (the Imam) said: "How many months are there in a year?". I said: "Twelve months." He said: "How many of them are sacred?". I said: "Four months." He said: "Is the month of Ramadan among them?". I said: "No." He said: "Indeed, in the month of Ramadan there is a night that is better than a thousand months. Indeed, we are a Household to whom none is compared with."