וַיִּצְבֹּ֨ר יוֹסֵ֥ף בָּ֛ר כְּח֥וֹל הַיָּ֖ם הַרְבֵּ֣ה מְאֹ֑ד עַ֛ד כִּי־חָדַ֥ל לִסְפֹּ֖ר כִּי־אֵ֥ין מִסְפָּֽר׃
And Joseph laid up corn as the sand of the sea, very much, until they left off numbering; for it was without number.
Midrash Tanchuma
What is written before this verse in Scripture? And all the countries came into Egypt to Joseph to buy corn (ibid. 41:57). They did so because he had devoted himself to accumulating corn, as is said: And Joseph laid up corn … during the seven years of plenty. And the seven years of famine began to come, according as Joseph had said (Gen. 41:49–53).