What is the ruling on remembrance (dhikr) and bathing in the bathroom during prayer time when not going to prayer?

Excessive use of water during ritual bathing (ghusl) or showering, to the point of missing the prayer or congregational prayer, is forbidden, whether it is due to fear of the prayer time expiring or merely for cleanliness. One who abandons the congregational prayer without a legitimate Shar'i excuse is at a loss. Uttering remembrance (dhikr) aloud in the bathroom is disliked (makrooh) because it contradicts showing reverence, but remembrance in the heart is permissible.