And they ascended by the south, and came unto Hebron; where Ahiman, Sheshai, and Talmai, the children of {f} Anak, were. (Now {g} Hebron was built seven years before Zoan in Egypt.)

(f) Which were a type of giant.

(g) Declaring the antiquity of it: also Abraham, Sarah, Isaac and Jacob were buried there.Numbers 13:22 Parallel Commentaries

Canaan
Canaan was the inheritance which the Israelites won for themselves by the sword. Their ancestors had already settled in it in patriarchal days. Abraham "the Hebrew" from Babylonia had bought in it a burying-place near Hebron; Jacob had purchased a field near Shechem, where he could water his flocks from his own spring. It was the "Promised Land" to which the serfs of the Pharaoh in Goshen looked forward when they should again become free men and find a new home for themselves. Canaan had ever been …
Archibald Sayce—Early Israel and the Surrounding Nations

Hebron
From Jericho we proceed to Hebron, far off in situation, but next to it in dignity: yea, there was a time, when it went before Jerusalem itself in name and honour;--namely, while the first foundations of the kingdom of David were laid; and, at that time, Jericho was buried in rubbish, and Jerusalem was trampled upon by the profane feet of the Jebusites. Hebron was placed, as in the mountainous country of Judea, so in a place very rocky, but yet in a very fruitful coast. "There is no place, in all …
John Lightfoot—From the Talmud and Hebraica

Numbers
Like the last part of Exodus, and the whole of Leviticus, the first part of Numbers, i.-x. 28--so called,[1] rather inappropriately, from the census in i., iii., (iv.), xxvi.--is unmistakably priestly in its interests and language. Beginning with a census of the men of war (i.) and the order of the camp (ii.), it devotes specific attention to the Levites, their numbers and duties (iii., iv.). Then follow laws for the exclusion of the unclean, v. 1-4, for determining the manner and amount of restitution …
John Edgar McFadyen—Introduction to the Old Testament