During the 23rd night of Shahr Ramadhan. One of the amaals involve putting the Holy Quran on the head and reciting Dua beseeching the intercession of the Holy Quran and the Ahlul Bayt. Why do we put the Holy Quran on the head and recite the Dua as part of the amaal? Is there a chain of narration that emphasizes on the importance of this a'maal to be performed in Laylatul Qadr?

This amal was reported from Imam Jafar Al-Sadiq (as)
It’s a symbolic act of worship reaffirming your belief in Qur’an and Ahlul bait (as)