A discussion between Imam al-Sadiq (as) and abu Hanifa, where the Imam shows through the Qur’an the blessings of the Prophet (sawa) and the lock on the heart of abu Hanifa.

Once Imam Jafar al Sadiq (as) was eating food with Abu Hanifa and after finishing Imam Jafar (as) expressed gratitude like this: “I thank Allah (swt) Who is the Sustainer of All Worlds, O Allah (swt) this was a blessing from You as well as from your Prophet (sawa).”
Upon hearing this Abu Hanifa said: “O Abu AbdAllah! You have included “someone else” alongside Allah (swt)”
Imam Jafar al-Sadiq (as) replied: “Be Careful, Allah (swt) says in His Book: “If only they had been content with what Allah and His Messenger had gave them, and had said, ‘Sufficient unto us is Allah! Allah and His Messenger will soon give us out of their Kindness.” [Holy Quran 9:59] And at another place Allah (swt) says: “…..And they only stayed in opposition because Allah and His Messenger enriched them out of His grace…” [Holy Quran 9:74]
After listening to these verses from Imam Jafar (as), Abu Hanifa said: “By Allah (swt), it seems I have never read or heard someone reciting these verses of the Holy Quran before.”
Imam Jafar al Sadiq (as) said: “No, its not like this! You have not only heard these verses before but also have read them. However, Allah (swt) says for you and people like you: “Will they then not meditate on the Quran, or are there locks on the hearts?” [Holy Quran 47:24] And says: “Nay, but that which they have earned is rust upon their hearts.” [Holy Quran 83:14]

Source: Bihaar al-Anwaar, Volume 47, Page 240, Hadith #25 (See Image below)