Leviticus 25:8

And let seven Sabbaths of years be numbered to you, seven times seven years; even the days of seven Sabbaths of years, that is forty-nine years;

Leviticus 23:15

And let seven full weeks be numbered from the day after the Sabbath, the day when you give the grain for the wave offering;

Genesis 2:2

And on the seventh day God came to the end of all his work; and on the seventh day he took his rest from all the work which he had done.

Treasury of Scripture Knowledge did not add

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain