First off, please check out Litany for Scarcity, which also explores themes from this week's Lectionary passages for Year A.
This week’s litany is based in the Lectionary texts from Exodus 16, Psalm 145, and Matthew 20.
God we know that what we have in this world is temporary.
All things pass away:
Our possessions,
Our bodies.We need bread for today,
For we don’t know what the future holds.