Traditionally, the prayers used for the Advent wreath for each week of Advent are the collects, or short prayers at the beginning of Mass, for the Sunday of Advent that begins that week. The text given here is of the collect for the First Sunday of Advent from the Traditional Latin Mass; you could also use the Opening Prayer for the First Sunday of Advent from the current missal.
We begin this first week of Advent by asking Christ to come, to set us free from our sins and from the punishment that we deserve.
ADVENT WREATH PRAYER FOR THE FIRST WEEK OF ADVENT
Bestir, O Lord, Thy might, we pray thee and come; that, defended by Thee, we may deserve rescue from approaching dangers brought on by our sins, and being set free by Thee, obtain our salvation. Who livest and reignest, with God the Father, in the unity of the Holy Ghost, God, world without end. Amen.
source: http://catholicism.about.com/od/prayers/qt/Adv_Wreath_W1.htm
ADVENT WREATH PRAYER FOR THE SECOND WEEK OF ADVENT
Stir up our hearts, O Lord, to prepare the ways of Thine only-begotten Son, that through His coming we may be worthy to serve Thee with purified minds. Who livest and reignest, with God the Father, in the unity of the Holy Spirit, God, world without end. Amen.
source: http://catholicism.about.com/od/prayers/qt/Adv_Wreath_W2.htm
ADVENT WREATH PRAYER FOR THE THIRD WEEK OF ADVENT
Incline Thine ear to our prayers, O Lord, we beseech Thee; and make bright the darkness of our minds by the grace of Thy visitation. Who livest and reignest, with God the Father, in the unity of the Holy Spirit, God, world without end. Amen.
source: http://catholicism.about.com/od/prayers/qt/Adv_Wreath_W3.htm
ADVENT WREATH PRAYER FOR THE FOURTH WEEK OF ADVENT
Bestir, O Lord, Thy might, we beseech Thee, and come; and with great power come to our aid, that, by the help of Thy grace, that which is hindered by our sins may be hastened by Thy merciful forgiveness. Who livest and reignest, with God the Father, in the unity of the Holy Spirit, God, world without end. Amen.
source: http://catholicism.about.com/od/prayers/qt/Adv_Wreath_W4.htm
