Hebrews 12:1 says we are surrounded by a great cloud of what?

Answer: Witnesses

Since we are surrounded by such a great cloud of witnesses, we are to throw off every encumbrance and run with endurance.

“Therefore, since we are surrounded by such a great cloud of witnesses, let us throw off every encumbrance and the sin that so easily entangles, and let us run with endurance the race set out for us.”— Hebrews 12:1 (BSB)