Albert Barnes Commentary Hebrews 11:34

"quenched the power of fire, escaped the edge of the sword, from weakness were made strong, waxed mighty in war, turned to flight armies of aliens." — Hebrews 11:34 (ASV)

Quenched the violence of fire. As Shadrach, Meshach, and Abednego did (Daniel 3:15–26).

Escaped the edge of the sword. As Elijah did when he fled from Ahab (1 Kings 19:3); as Elisha did when he was delivered from the king of Syria (2 Kings 6:16); and as David did when he fled from Saul.

Out of weakness were made strong. Enabled to perform exploits beyond their natural strength, or raised up from a state of bodily infirmity, and invigorated for conflict. Such a case as that of Samson may be referred to (Judges 15:16, 16:26-30); or as that of Hezekiah (2 Kings 20), who was restored from dangerous sickness by the immediate interposition of God.

See Barnes on Isaiah 38.

Waxed valiant in fight. Became valiant. Like Joshua, Barak, David, etc. The books of Joshua, Judges, Samuel, and Kings supply instances of this in abundance.

Turned to flight the armies of the aliens. The foreigners—as the invading Philistines, Ammonites, Moabites, Assyrians, etc.