This is a Russian Orthodox chant named 'Да исправится молитва моя' (May my prayer be set).
The lyrics are taken from the Book of Psalms:
May my prayer be set before you like incense, and the lifting up of my hands as the evening sacrifice!
O Lord, I call upon you; hasten to me! Give ear to my voice when I call to you!
May my prayer be set before you like incense, and the lifting up of my hands as the evening sacrifice!
Set a guard, O Lord, over my mouth; keep watch over the door of my lips!
May my prayer be set before you like incense, and the lifting up of my hands as the evening sacrifice!
Do not let my heart incline to any evil, to busy myself with wicked deeds.
May my prayer be set before you like incense, and the lifting up of my hands as the evening sacrifice!
(Psalm 141:1-4)
