This was narrated by Sheikh al-Tusi in al-'Uddah. As for what we do not find a narration from them about, we cite what has reached us from others among the scholars of exegesis, provided it agrees with the Quran and its essence (fahwahu) and resembles their narrations in its meaning. For if we do not rely on it from the aspect of the chain of transmission (isnad), we rely on it from the aspect of agreement, resemblance, and soundness.

From Abu Abdillah (PBUH), who said: The Messenger of Allah (PBUH) said: 'Indeed, upon every truth is a reality (haqiqa), and upon every correctness is a light. So what agrees with the Book of Allah, take it; and what contradicts the Book of Allah, leave it.'"

And al-Sadiq said: "Whatever narration comes to you from a righteous person (barr) or a wicked one (fājir) that agrees with the Quran, then take it; and whatever comes to you from a righteous person or a wicked one that contradicts the Quran, do not take it."

And al-Kazim said: "If two differing narrations come to you, measure them against the Book of Allah and against our narrations; that which resembles them is truth, and that which does not resemble them is falsehood."