Kutoka 31:17

Itakuwa ishara kati yangu na Waisraeli milele, kwa kuwa kwa muda wa siku sita Bwana aliumba mbingu na dunia, na siku ya saba akaacha kufanya kazi, akapumzika.’ ”

It is a sign between me and the children of Israel for ever: for in six days the LORD made heaven and earth, and on the seventh day he rested, and was refreshed.