'Weak' in the Bible

Asa prayed to the Lord his God: "O Lord, there is no one but you who can help the weak when they are vastly outnumbered. Help us, O Lord our God, for we rely on you and have marched on your behalf against this huge army. O Lord our God, don't let men prevail against you!"

Even though the invading Syrian army was relatively weak, the Lord handed over to them Judah's very large army, for the people of Judah had abandoned the Lord God of their ancestors. The Syrians gave Joash what he deserved.