Moses
Leviticus 25:8ESV·traditional attribution

“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.

John Calvin Reformed @genevareformer

8. And thou shalt number seven. The third kind of Sabbath follows, which was composed of forty-nine, or seven times seven years. This was the most illustrious Sabbath, since the state of the people, both as to their persons and their houses and property, was renewed; and although in this way God had regard to the public good, gave relief to the poor, so that...

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The general institution of the jubilee, Lev 25:8. etc. 1. When it was to be observed: after seven sabbaths of years (Lev 25:8), whether the forty-ninth or fiftieth is a great question among learned men: that it should be the seventh sabbatical year, that is, the forty-ninth (which by a very common form of speech is called the fiftieth), seems to me...

Commenting on Leviticus 25:8-22

John Gill Reformed Baptist @doctorgill

And thou shalt number seven sabbaths of years unto thee,.... Or weeks of years; and there being seven days in a week, and a day being put for a year, seven weeks of years made forty nine years; the Targums of Onkelos and Jonathan, and Jarchi, interpret it seven "shemittas", or sabbatical years; and a sabbatical year being every seventh year, made the same number...