For if before men, indeed, they be punished, yet is their hope full of immortality; chastised a little, they shall be greatly blessed, because God tried them and found them worthy of himself. As gold in the furnace, he proved them, and as sacrificial offerings he took them to himself. In the time of their visitation they shall shine, and shall dart about as sparks through stubble; they shall judge nations and rule over peoples, and the Lord shall be their King forever.
Those who trust in him shall understand truth, and the faithful shall abide with him in love: because grace and mercy are with his holy ones, and his care is with his elect."
-- From the Book of Wisdom, (a reading for Mass on All Soul's Day).
Eternal rest grant unto them, O Lord, and let perpetual light shine upon them. May their souls and the souls of all the faithful departed. Through the mercy of God, rest in peace.
In paradisum (English: "Into paradise") is an antiphon from the traditional Latin liturgy of the Roman Catholic Requiem Mass. It is sung by the choir as the body is being taken out of the church:Amen
In paradisum deducant te Angeli; in tuo adventu suscipiant te martyres, et perducant te in civitatem sanctam Ierusalem. Chorus angelorum te suscipiat, et cum Lazaro quondam paupere æternam habeas requiem.
May angels lead you into paradise; upon your arrival, may the martyrs receive you and lead you to the holy city of Jerusalem. May the ranks of angels receive you, and with Lazarus, the poor man, may you have eternal rest.
Mozarts Requiem Mass in D Minor
Some other reflections for All Saints here, here and here.