Surah Al-Muzzammil, ayah 4

أَوۡ زِدۡ عَلَيۡهِ وَرَتِّلِ ٱلۡقُرۡءَانَ تَرۡتِيلًا ٤

Aw zid 'alayhi warattilil-qur'āna tartīlā

Or add to it, and recite the Qur’ān with measured recitation.