Komentarz do Rodzaju 45:9

ועלו אל אבי AND GO UP TO MY FATHER — he said “go up” because the land of Israel is situated higher than all the neighbouring countries (Kiddushin 69a).

מהרו, so that he will not worry and agonise any longer.

רדה אלי, “come down to me!” he did not say: רד “come down”, which has the the numerical value of 204, but said רדה is the numerical value of 209, to indicate that the 210 years decreed for the Israelites stay in Egypt had already started i.e. we are already within the 210 years decreed for the Israelites stay in Egypt so that the exile would not be lengthened by Yaakov and family resettling in Egypt without delay. There are only 209 of these years left.