Parashas Bo · Shemos 11:7 · TT note 2
Chabad.org — English translation + Rashi
Torah Temimah on Shemos 11:7, note 2 (on לֹא יֶחֱרַץ כֶּלֶב לְשֹׁנוֹ) links this restraint of the dogs to the later law of a tereifah thrown to the dog (Mishpatim), teaching that the Holy One does not withhold the reward of any creature.
Sefaria — Exodus 11:7
Sefaria — Torah Temimah on Exodus 11:7
Sefaria — Exodus 22:30 (Mishpatim parallel)
English: “A dog shall not whet its tongue” — therefore the Torah said regarding a tereifah (in Mishpatim), “You shall throw it to the dog,” to teach you that the Holy One, blessed be He, does not withhold the reward of any creature.
Linkage of this passuk’s quiet dogs to the later mitzvah of giving a tereifah to the dog: measure-for-measure reward for the creature that held its tongue in Egypt.
Because the dogs did not bark against Israel, the Torah later assigns them the tereifah, teaching that God does not withhold reward from any creature.