Genesis 43:29

אלהים יחנך בני GOD BE GRACIOUS UNTO THEE, MY SON — With regard of the other sons of Jacob we have heard the expression “grace” used — viz., (33:5) “[The children] whom God hath graciously given (חנן) to thy servant”. But Benjamin had not then been born and therefore was not included amongst the children of whom Jacob used this term; on this account Joseph used the term “grace” in blessing him (Genesis Rabbah 92:5).

וַיִּשָּׂ֣א עֵינָ֗יו וַיַּ֞רְא אֶת־בִּנְיָמִ֣ין אָחִיו֮ בֶּן־אִמּוֹ֒ וַיֹּ֗אמֶר הֲזֶה֙ אֲחִיכֶ֣ם הַקָּטֹ֔ן אֲשֶׁ֥ר אֲמַרְתֶּ֖ם אֵלָ֑י וַיֹּאמַ֕ר אֱלֹהִ֥ים יׇחְנְךָ֖ בְּנִֽי׃

And he lifted up his eyes, and saw his brother Binyamin, his mother’s son, and said, Is this your younger brother, of whom you spoke to me? And he said, God be gracious to thee, my son.