Leviticus 25:2

2Speak to the sons of Israel, and you shall say to them: When you will have entered into the land which I will give to you, rest on the Sabbath of the Lord.
25:2The Hebrew word Shabbat (Shin-Bet-Tav) means to rest; so the Latin expression ‘sabbatizes sabbatum’ means to rest on the Sabbath.(Conte)
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