עֵ֤דוּת ׀ בִּֽיה֘וֹסֵ֤ף שָׂמ֗וֹ בְּ֭צֵאתוֹ עַל־אֶ֣רֶץ מִצְרָ֑יִם שְׂפַ֖ת לֹא־יָדַ֣עְתִּי אֶשְׁמָֽע׃
c’est un témoignage qu’il établit dans Joseph, quand il marcha contre l’Égypte. J’entendis alors des accents inconnus pour moi…
Rashi on Psalms
As a testimony for Jehoseph He ordained it On Rosh Hashanah, Joseph went out of prison.
Rashi on Psalms
[when] I understood a language that I had not known It is explained in tractate Sotah (36b) that [the angel] Gabriel taught him seventy languages.