Acts 7:17
"But when the time of the promise drew nigh, which God had sworn to Abraham, the people grew and multiplied in Egypt,"
Cross References (ranked by relevance)
Acts 7:6
And God spake on this wise, That his seed should sojourn in a strange land; and that they should bring them into bondage, and entreat them evil four hundred years.
Acts 13:17
The God of this people of Israel chose our fathers, and exalted the people when they dwelt as strangers in the land of Egypt, and with an high arm brought he them out of it.
Exodus 1:20
Therefore God dealt well with the midwives: and the people multiplied, and waxed very mighty.