tourniquet

The dictionary defines a tourniquet as a surgical device for arresting / stopping haemorrhage by compression of a blood vessel.

Meaning could be adapted a couple of ways:
(Surgical) Cloth or band tightened around a part of the body (like the arm) to stop blood flow temporarily.
(Religious) What Christ offers to anyone who comes to Him - Psalm 147:3 says that, "He heals the broken-hearted and binds up their wounds".

You choose your own meaning.

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