Surah Nuh 71:5
قَالَ رَبِّ إِنِّى دَعَوْتُ قَوْمِى لَيْلًا وَنَهَارًا
He said, "My Lord, indeed I invited my people [to truth] night and day.
Translation: Saheeh International
Tafsir
He said ‘My Lord I have summoned my people night and day that is to say continuously without interruption
Excerpt from Tafsir al-Jalalayn, commentary on 71:5, via Quran.com. The reader has the full commentary and 9 more tafsirs.