чэщы рэхьат къышъокӏу

Etymology
From чэщы "night" + рэхьат "comfortable" + къышъокӏу (къы-шъо-кӏу) "he/she/it come to you (plural)" hence literally “may the comfortable night come to you (plural)”.

Interjection

 * 1) good night (said to plural)