May the angels escort you into paradise; at your coming, may the martyrs receive you and bring you into the holy city, Jerusalem. May the chorus of angels receive you, and with Lazarus, once a poor man, may you have eternal rest.
In Paradisum is the Gregorian chant antiphon sung at the end of the traditional Roman Catholic Requiem Mass as the body is being taken out of the church. The chant is in the mixolydian mode.
Find a list of other chant themes here.