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25"You shall not revile God, nor curse a ruler of your people. 26"You shall not delay to offer from the fulness of your harvest and from the outflow of your presses. "The first-born of your sons you shall give to me. 27You shall do likewise with your oxen and with your sheep: seven days it shall be with its dam; on the eighth day you shall give it to me.
Exodus 22:25-27 (RSV)