Hur is considered to be a military hero in the Bible during the era of Moses.
He became a hero by helping Moses raise his hand in prayer during the war between the Israelites and the amalekites.
But Moses’ hands grew weary, so they took a stone and put it under him, and he sat on it, while Aaron and Hur held up his hands, one on one side, and the other on the other side. So his hands were steady until the going down of the sun.
EXODUS 17:12 ESV
Acts of heroism may come disguised as fairly simple gestures.
While Joshua and his army wielded their swords and shields against the Amalekites, the true heroes that day observed the fight from the top of a nearby hill. The Bible records that Moses, Aaron, and Hur climbed a hill in the vicinity of the conflict in order to watch Israel fight at Rephidim. With the battle raging below, Moses raised his hands in prayer to God. As long as Moses kept his hands raised, Israel secured the
upper hand in the battle. But when Moses grew tired and lowered his hands, the Amalekites began to win the battle.
Hur became a military hero that day by faithfully doing the simplest of tasks: helping Moses raise his tired arms. After finding a rock for Moses to sit on, Aaron stood on one side of Moses and Hur on the other.
Together they held his arms up until the sun set. Because of Hur’s unpretentious contribution, the Israelites crushed the enemy army.
In addition to his place in this story, Hur is also noted as serving as a leader to the people. When Moses went to Mount Sinai, he left Aaron and Hur behind as his representatives to handle disputes and conflicts that might arise while he was gone (Exodus 24:14).