Moreover, thou leddest them in the day by a cloudy pillar,
 &c.] The Israelites, to shelter them from the heat of the sun in a dry and barren wilderness: 
 and in the night by a pillar of fire, to give them light in the way
 wherein they should go;
 through a trackless desert, see ( Exodus 13:21 Exodus 13:22 ) .