Rashi on Deuteronomy 32:10/רש"י על דברים ל״ב:י׳

1ימצאהו בארץ מדבר HE FOUND HIM IN A DESERT LAND — for them (Jacob’s sons) he found to be faithful to Him in the desert land, when they accepted His Torah, His sovereignty and His yoke, something that Ishmael and Esau had refused to do, as it is said, (Deuteronomy 33:2) “And He shone from the Seir (Esau) unto them, He appeared from Mount Paran (Ishmael)” (cf. Rashi on that verse).

2ובתהו ילל ישמן AND IN THE DESOLATE HOWLING SOLITUDE — i.e. in a land of drought and desolation, a place of screeching monsters and ostriches; even there they adhered to their faith and did not say to Moses, “But how can we go out into the wilderness, a place of drought and desolation?” — just as it is stated, (Jeremiah 2:2) “[I remember the loving kindness of your youth, the love of your espousals,] When you went after Me in the wilderness, [in to a land that was not sown]” (cf. Rashi on Exodus 12:39).

3יסבבנהו HE SURROUNDED HIM — there He surrounded them and encompassed them with the “clouds of Glory”; He surrounded them with the banners on their four sides; he surrounded them by the underside of the mountain (Sinai), which He arched over them like a cask (cf. Sifrei Devarim 313:11).

4יבוננהו HE INSTRUCTED HIM there in Torah and wisdom.

5יצרנהו HE GUARDED HIM from snakes, serpents and scorpions and from hostile nations,

6כאישון עינו AS THE אישון OF HIS EYE — that is the black in the eye from which the light comes. Onkelos, however, rendered ימצאהו by “He provided Him” with all He needed in the wilderness. It took the words to be of the same meaning as, (Numbers 11:22) “[Shall the flocks … be slain for them] to suffice (ומצא) them?” and (Joshua 17:16) “The hill is not enough (ימצא) for us”.

7יסבבנהו — Onkelos renders this by “He made them abide round about His Divine dwelling place” — the “tent of congregation” in the middle and the divisions of the tribes (lit., the banners) on the four sides.