וַיֹּ֙אמֶר֙ יִשְׂרָאֵ֔ל רַ֛ב עוֹד־יוֹסֵ֥ף בְּנִ֖י חָ֑י אֵֽלְכָ֥ה וְאֶרְאֶ֖נּוּ בְּטֶ֥רֶם אָמֽוּת׃
Und Israel sprach: Genug! Mein Sohn Joseph lebt noch! Ich will hingehn und ihn sehen, bevor ich sterbe.
Rashi on Genesis
רב ENOUGH or MUCH — Much joy and pleasure is still in store for me, since my son Joseph is yet alive.
Rashbam on Genesis
רב; my heart has stood still long enough during all the years I did not think that Joseph was still alive now I am definitely convinced
Sforno on Genesis
רב...אלכה ואראנה, I will go and see him, but will not remain there as he has said.