The souls of the just are in the hand of God, and no torment shall touch them. They seemed, in the view of the foolish, to be dead; and their passing away was thought an affliction and their going forth from us, utter destruction. But they are in peace. (Wis 3:1-9)
https://bible.usccb.org/bible/readings/110223.cfm
Give rest, O Christ,
to thy servants with thy saints,
where sorrow and pain are no more;
neither sighing, but life everlasting.
(Russian Kontakion for the Departed, Orthodox Liturgy)

Eternal rest grant unto them, O Lord. And let perpetual light shine upon them. May they rest in peace. Amen. And may their souls, and the souls of all the faithful departed through the mercy of God rest in peace. Amen.