Deuteronomy 1:28Whither shall we go up? our brethren have discouraged our heart, saying, The people is greater and taller than we; the cities are great and walled up to heaven; and moreover we have seen the sons of the Anakims there.
Joshua 14:8Nevertheless my brethren that went up with me made the heart of the people melt: but I wholly followed the LORD my God.
Numbers 32:9For when they went up unto the valley of Eshcol, and saw the land, they discouraged the heart of the children of Israel, that they should not go into the land which the LORD had given them.
Deuteronomy 9:1Hear, O Israel: Thou art to pass over Jordan this day, to go in to possess nations greater and mightier than thyself, cities great and fenced up to heaven,
Hebrews 3:19So we see that they could not enter in because of unbelief.