The Canticle of Mary is the first prayer of the Church, a paradoxical prayer of triumph through humility that leads us to Christ. So why don't we pray it more? http://www.pbgrace.com/why-not-the-magnificat/
Psalm 134- Greetings of Night Watchers. A Song of Ascents. 1 Behold, bless the Lord, all servants of the Lord, Who serve by night in the house of the Lord! 2 Lift up your hands to the sanctuary And bless the Lord. 3 May the Lord bless you from Zion, He who made heaven and earth.