וּבְנֵ֣י יִשְׂרָאֵ֗ל פָּר֧וּ וַֽיִּשְׁרְצ֛וּ וַיִּרְבּ֥וּ וַיַּֽעַצְמ֖וּ בִּמְאֹ֣ד מְאֹ֑ד וַתִּמָּלֵ֥א הָאָ֖רֶץ אֹתָֽם׃ (פ)
And the children of Israel were fruitful, and increased abundantly, and multiplied, and waxed exceeding mighty; and the land was filled with them.
Mishneh Torah, Leavened and Unleavened Bread
"And he became there a nation" - [this] teaches that Israel [became] distinguishable there. "Great, powerful" - as it is stated (Exodus 1:7), "And the Children of Israel multiplied and swarmed and grew numerous and strong, most exceedingly and the land became full of them."