אלשיך — מהרו ועלו אל אבי / רדה אלי אל תעמד

Q — Why does Yosef demand such urgency — 'מהרו... רדה אלי אל תעמד'? Isn't it disrespectful to insist his father not just descend but hurry?

A — Yaakov possessed a tradition that the Egyptian exile would last 210 years (the gematria of רד"ו), and Yosef knew it too. When Yosef tells Yaakov 'שמני אלהים לאדון לכל מצרים,' his message is theological, not bragging: the time for galut has arrived, and ordinarily Yaakov would have descended 'בשלשלאות של ברזל,' dragged to Pharaoh like the midrash's cow led to the slaughterhouse. The Ribbono shel Olam, having mercy on Yaakov, arranged for Yosef to be made ruler so that Yaakov's descent would be 'בבחירה וכבוד' — to Yosef rather than to Pharaoh. The urgency — 'אל תעמד' — is because 'מעלת שעה היא לכבודך': Yosef's position is temporary, granted only for the duration of this dignified entry, and any delay risks losing the window.