The readings for this Sunday are:
Jeremiah — foretelling a new covenant, one in which the law is written on people’s hearts, and in which people know the Lord by his forgiveness of sins
Psalm 51 — Miserere mei. I have sinned; cleanse me from my sin, create within me a clean heart and a right spirit
Psalm 119 — Teach me your ways, Lord; delighting in the statues of God
Hebrews — the high priesthood of Christ, and eternal salvation through Him
John — Some Greeks want to see Jesus, and Jesus is alluding to his death.
One possible piece for this Sunday would be “A New Heart” by Melissa Dunphy.
The text, from Ezekiel 36:26 (“A new heart I will give you, and a new spirit I will put within you; and I will remove from your body the heart of stone and give you a heart of flesh”) is particularly suitable if you are using or wish to allude to Psalm 51. The setting is for SAB and piano, and easy to sing and play. I love the directness and sparse simplicity of this piece; there’s nothing extraneous or distracting. It’s available to purchase from MorningStar Music Publishers and a pdf perusal score and mp3 are available.