Maariv or Maʿariv (Hebrew: מַעֲרִיב, [maʔaˈʁiv]), also known as Arvit, or Arbit (Hebrew: עַרְבִית, [ʔaʁˈvit]), is a Jewish prayer service held in the evening...

say Aleinu le’shebeaḥ only during the Morning (shaḥrith) and Evening ('arvith) prayers, but not in the Afternoon prayer (minḥah). The older prayer books...