וַיִּפְנוּ֙ וַיַּעֲל֣וּ הָהָ֔רָה וַיָּבֹ֖אוּ עַד־נַ֣חַל אֶשְׁכֹּ֑ל וַֽיְרַגְּל֖וּ אֹתָֽהּ׃
and they turned and went up into the mountains, and came unto the valley of Eshcol, and spied it out.
Read Jewish philosophical commentary on Deuteronomy 1:24: and classical philosophical sources.