Deuteronomy 3:5

All these cities were fortified with high walls, gates, and bars; besides a good many unwalled towns.

Numbers 13:28

However, the people that dwell in the land are strong, and the cities are walled, very great. And also we saw the children of Anak there.

Deuteronomy 1:28

Where shall we go up? Our brothers have broken our heart, saying, We have seen there a people greater and taller than we are. The cities are great and walled up to the heavens, also the sons of the giants.

Hebrews 11:30

By faith the walls of Jericho fell down, after they had been compassed seven days.

Treasury of Scripture Knowledge

Summary

All these cities were fenced with high walls, gates, and bars; beside unwalled towns a great many.

Bible References

General references

Deuteronomy 1:28
Where shall we go up? Our brothers have broken our heart, saying, We have seen there a people greater and taller than we are. The cities are great and walled up to the heavens, also the sons of the giants.
Numbers 13:28
However, the people that dwell in the land are strong, and the cities are walled, very great. And also we saw the children of Anak there.
Hebrews 11:30
By faith the walls of Jericho fell down, after they had been compassed seven days.