BaMidbar 9:19

¹⁹ ובהאריך העןן על־המשכן ימים רבים ושמרו בני־ישראל את־משמרת יהוה ולא יסעו׃

By Henry MacLagan

Verse 19. But during such obscurity, progress in the spiritual life is delayed; yet there is no retrogression although there is no progress.