The First Sunday of Lent is characterized by Psalm 90 (91), Qui habitat, which contains the lines related to the angels lifting up those who are faithful to the Lord.
In addition to using this psalm extensively for the extremely long Tract (which takes about 13 minutes to sing in the proper tones), all the antiphons of the Mass and also the gradual come from this psalm. Furthermore, this psalm is quoted in the Gospel (by the devil).
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