Sforno on Exodus 18:8/ספורנו על שמות י״ח:ח׳

1את אשר עשה ה' לפרעה ולמצרים על אודות ישראל. A reference to G’d performing vengeance as the avenger of His people. Compare Deuteronomy 32,41 for similar syntax used by Moses. when he quotes G’d as saying אשיב נקם לצרי, “vengeance will I wreak on My foes.” This referred to the Egyptians experiencing G’d’s retribution on their own bodies when they drowned in the sea. In Psalms 78,49 the psalmist describes 4, resp. 5 stages of G’d’s anger which the Egyptians had to experience before they died. Tthat verse is the subject of detailed analysis in the Haggadah shel Pessach. These events proved that G’d had chosen the Jewish people as His most treasured possession among the nations.

2את כל התלאה אשר מצאתם בדרך, hunger, thirst, and the unprovoked attack by Amalek.

3'ויצילם ה, this demonstrated G’d’s personal concern and involvement in the fate of the Jewish nation. The reason for this could only be that the religious principles as well as their deeds found favour in G’d’s eyes, preparing the way for all of them to serve Him in unison.