Leviticus 25:8

You shall count seven weeks of years , seven times seven years , so that the time of the seven weeks of years shall give you forty-nine years .

“‘Count off seven sabbath years—seven times seven years—so that the seven sabbath years amount to a period of forty-nine years.

And thou shalt number seven sabbaths of years unto thee, seven times seven years; and the space of the seven sabbaths of years shall be unto thee forty and nine years.