כִּֽי־תְשִׁיתֵ֣הוּ בְרָכ֣וֹת לָעַ֑ד תְּחַדֵּ֥הוּ בְ֝שִׂמְחָ֗ה אֶת־פָּנֶֽיךָ׃
Oui, tu as fait de lui à jamais une source de bénédictions; par ta présence, tu l’as mis au comble de la joie.
Chizkuni
ויחד יתרו, “Yitro rejoiced;” we find this root meaning the same in Psalms 21,7: תחדהו בשמחה, “You gladdened him with the joy (of Your presence)” [A reference to the Messiah having been gladdened. Ed.] [I have not understood what follows concerning the comparison with Numbers 21,1 and Job 31,27. Ed.] Rashi on this verse brought the talmudic saying: “That is what people say (what the common proverb says): A proselyte even though his heathen descent dates from as far back as the tenth generation, do not speak slightingly of an Aramean (any non-Jew) in his presence (Sanhedrin 94a).” There are some (Hadar Zekenim) who say that this is because Ishmael son of Netanya that was a tenth generation descendant to an Egyptian convert, and he had made the Egyptians revenge on Israel.