Mark 2:21
No man also seweth a piece of new cloth on an old garment: else the new piece that filled it up taketh away from the old, and the rent is made worse.
Cross-reference
Matthew 9:16
Parallel
Matthew 9:16 records the same saying about unshrunk cloth—a direct synoptic parallel.
Luke 5:36
Parallel
Luke 5:36 gives the same parable of new and old garments—a synoptic parallel with slight variation.