George Haydock's Catholic Bible Commentary - Numbers 13:1
Pharan, at Rethma, chap. xxxiii. 48.; though Barradius confounds that station with that at Cades-barne. The Samaritan copy inserts here a long passage, taken probably from Deuteronomy i. 20, 21, and 22, which shews that the Hebrews first proposed the sending spies, out of timidity; which God severely punished in the sequel, though in his anger he here consents to their proposal, which seemed to originate in motives of prudence, ver. 3. read more
Hawker's Poor Man's Commentary - Numbers 13:1-2
If we compare those verses with Deuteronomy 1:19-23 , we shall discover that, though as in this place it is said, that the LORD spake unto Moses concerning those spies, going to search the land, yet the thought originated in some of the people. The LORD himself had spied out the land for them long before, and declared it to be a good land, and had promised it to their fathers; but notwithstanding this, they chose to see it for themselves, and did not wish altogether to trust to the LORD. See... read more