Narrated Ibn Umar:
Allah's Apostle said, "The example of the person who knows the Qur'an by heart is like the owner of tied camels. If he keeps them tied, he will control them, but if he releases them, they will run...
Glory is to Him Whom thunder and angels glorify due to fear of Him.
Info: Whenever Abdullah bin Zubair (RA) would hear thunder, he would abandon all conversation and say this supplication. See Al-Muwatta' 2/992. It was graded authentic by Al-Albani as a statement of Abdullah bin Zubayr only.