Move not your tongue with it, [O Muhammad], to hasten with recitation of the Qur'an.
Tafseer
قال تعالى لنبيه: { لا تحرك به } بالقرآن قبل فراغ جبريل منه { لسانك لتعجل به } خوف أن ينفلت منك.
God Almighty said to His Prophet: {Do not move your tongue with it} with the Qur’an before Gabriel finished it {to hasten with it} for fear that it might slip away from you.