עד נחל אשכל. מַגִּיד שֶׁנִּקְרָא עַל שֵׁם סוֹפוֹ (שם): עד נחל אשכל [AND THEY CAME] TO THE BROOK OF ESHCOL — This tells us that it was so called on account of what was eventually, to happen there [— that they took from there a cluster (אשכל) of grapes] (Sifrei Devarim 22:2).
וירגלו אתה. מְלַמֵּד שֶׁהָלְכוּ בָהּ אַרְבָּעָה אֻמָּנִין שְׁתִי וָעֵרֶב (שם): וירגלו אתה AND THEY SPIED IT OUT — This teaches as that they passed through it along four lines, along the length and the breadth (Sifrei Devarim 22:3; cf. Rashi on Numbers 13:21).