1 Chronicles 5:20
And they were helped against them, and the Hagarites were delivered into their hand, and all that were with them: for they cried to God in the battle, and he was intreated of them; because they put their trust in him. And they were helped against them, and the Hagarites were delivered into their hand, and all that were with them: for they cried to God in the battle, and he was intreated of them; because they put their trust in him.
The children of Reuben and Gad and the half-tribe of Manasseh were helped against the Hagarites in battle. The Hagarites and all that were with them were delivered into their hand. This came because in their time of need they cried to God in the midst of the battle and put their trust in Him. He was entreated of them, and heard and answered them and gave their enemies into their hand. Their example shows that a person need not wait, but can ask God for help at the very moment of struggle and receive help.