Surah Al-Muzzammil 73:7
إِنَّ لَكَ فِى ٱلنَّهَارِ سَبْحًا طَوِيلًا
Indeed, for you by day is prolonged occupation.
Translation: Saheeh International
Tafsir
For assuredly during the day you have extended engagements administering your affairs and you do not have the time to recite Qur’ān.
Excerpt from Tafsir al-Jalalayn, commentary on 73:7, via Quran.com. The reader has the full commentary and 9 more tafsirs.