The Old Testament is full of examples of faith

^32-38 And what other examples shall I give? There is simply not time to continue by telling the stories of Gideon, Barak, Samson and Jeptha; of David, Samuel and the prophets. Through their faith these men conquered kingdoms, ruled in justice and proved the truth of God’s promises. They shut the mouths of lions, they quenched the furious blaze of fire, they escaped from death itself. From being weaklings they became strong men and mighty warriors; they routed whole armies of foreigners. Some returned to their womenfolk from certain death, while others were tortured and refused to be ransomed, because they wanted to deserve a more honourable resurrection in the world to come. Others were exposed to the test of public mockery and flogging, and to the torture of being left bound in prison. They were killed by stoning, by being sawn in two; they were tempted by specious promises of release and then were killed with the sword. Many became refugees with nothing but sheepskins or goatskins to cover them. They lost everything and yet were spurned and ill-treated by a world that was too evil to see their worth. They lived as vagrants in the desert, on the mountains, or in caves or holes in the ground.