If you get Jesus at the well with the Samaritan woman, you are using the reading for Year A. Since I do not know what readings will be chosen, I will give the Collect for your attention this Sunday.
Collect: O God, author of every mercy and of all goodness, who in fasting, prayer and almsgiving have shown us a remedy for sin, look graciously on this confession of our lowliness, that we, who are bowed down by our conscience, may always be lifted up by your mercy.
The mail problem with Collects is that they are read at the beginning of Mass and they are written in such a way that it is hard to grasp what we are really praying for during the Liturgy. Here we are asking that we may always be lifted up by God's mercy. Now that is worth praying for, but it gets lost in the reading of the prayer.