Consistency of Imamat Based on Verse 51 of Qesas Sura

The author believes that verse 51 from Qesas Sura is of the verses confirming Imamat of Ahlul Bayt. Here, first, the special words of the verse has been clarified and explained; the ideas of commentators have also been mentioned and then he states "holy Quran is not enough to warn and forsure it needs Infallible commentators to be fully understood". After that, he mentions 5 narrations asserting the concept of "We have brought them the word vassal na lahomol ghaul" in that verse, refers to continuity of Imamat.