Rephaim

Giants in the Land: A Biblical Theology of the Nephilim, Anakim, Rephaim (and Goliath)  

Giants in the Land: A Biblical Theology of the Nephilim, Anakim, Rephaim (and Goliath)   

Israel initially refused to enter the land because of giants, and only men of great faith (Joshua, Caleb, and David) were able to defeat them.