Mark 2:21
No one sews a patch of unshrunk cloth on an old garment. If he does, the new piece will pull away from the old, and a worse tear will result.
What it says
Jesus says a new cloth patch on an old garment will pull away and make the tear worse.
What it is doing
Old fabric cannot hold a new patch.
In context
21No one sews a patch of unshrunk cloth on an old garment. If he does, the new piece will pull away from the old, and a worse tear will result. 22And no one pours new wine into old wineskins. If he does, the wine will burst the skins, and both the wine and the wineskins will be ruined. Instead, new wine is poured into new wineskins.”