`O vos omnes` is a responsory, originally sung as part of Roman Catholic liturgies for Holy Week, and now often sung as a motet. The text is adapted from the Latin Vulgate translation of Lamentations 1:12. It was often set as part of the Tenebrae Responsories for Holy Saturday.
Latin text:
O vos omnes qui transitis per viam, attendite et videte:
• Si est dolor similis sicut dolor meus.
Versus: Attendite, universi populi, et videte dolorem meum.
• Si est dolor similis sicut dolor meus.