Tobias and St Raphaeldel Verrochio, 1470-75
The Magnificat antiphon for I Vespers points us to the wonderful book of Tobit, which is started at Matins this Sunday:
Ne reminiscaris Domine delicta mea, vel parentum meorum: neque vindictam sumas de peccatis meis.or
Remember not, Lord mine offences, nor the offences of my forefathers, neither take Thou vengeance of my sins.
The Benedictus (Nolite solliciti esse/Do not be anxious) and Magnificat (Quaerite primum regnum Dei/Seek ye first the Kingdom of God) antiphons for Sunday refer to the Gospel, St Matthew 6:24-33, part of the Sermon on the Mount.