I found this beautiful evening prayer in the "Mishkan T'Filah, A Reform Siddur." Although I am a Christian I've found this lovely book a comfort and it has deepened my faith. I say this prayer every evening, before bed:
Give us a place to rest, O God.Shelter us in the long, soft, evening shadows of Your truth.You are true protection and safety,in Your Presence we find love and acceptance.Watch over us as we go forth.Prepare for us as we return.Spread over us Your shelter of peace,over all we love -- over our Jerusalem and Yours.
The Siddur advises:
"Recited only at night, this final benediction...is a prayer for divine protection as we sleep."
More information about text formats