The collect for today, The First Sunday After Easter, from the 1662 Book of Common Prayer:

Almighty Father, who hast given thine only Son to die for our sins, and to rise again for our justification; Grant us so to put away the leaven of malice and wickedness, that we may alway serve thee in pureness of living and truth; through the merits of the same thy Son Jesus Christ our Lord. Amen.

The Epistle: 1 St John 5:4-12
The Gospel: St John 20:19-23