Genesis 47:30

ושכבתי עם אבתי BUT I WILL LIE WITH MY FATHERS — This ו of ושכבתי is the connecting link with the beginning of the verse above: Put thy hand beneath my thigh and swear unto me that you will not bury me in Egypt. For I must ultimately lie with my fathers (i.e. die as all my fathers have died) and you shall carry me out of Egypt. One cannot say that “I will lie with my fathers” means “make me lie with my fathers in the cave” (i.e. bury me), for immediately after this it is written “And thou shalt carry me out of Egypt and bury me in their burying place”. Further we find that wherever the term “lying with one’s fathers” is used it denotes dying and not burial. For instance, (1 Kings 2:10) “and David lay with his fathers”, and afterwards it states “and he was buried in the city of David”.

וְשָֽׁכַבְתִּי֙ עִם־אֲבֹתַ֔י וּנְשָׂאתַ֙נִי֙ מִמִּצְרַ֔יִם וּקְבַרְתַּ֖נִי בִּקְבֻרָתָ֑ם וַיֹּאמַ֕ר אָנֹכִ֖י אֶֽעֱשֶׂ֥ה כִדְבָרֶֽךָ׃

but I will lie with my fathers, and thou shalt carry me out of Miżrayim, and bury me in their buryingplace.