Commentaries:
Jamieson, Fausset, and Brown
it shall be for a sign unto thee upon thine hand, etc.—There is no reason to believe that the Oriental tattooing—the custom of staining the hands with the powder of Hennah, as Eastern females now do—is here referred to. Nor is it probable that either this practice or the phylacteries of the Pharisees—parchment scrolls, which were worn on their wrists and foreheads—had so early an existence. The words are to be considered only as a figurative mode of expression.
that the Lord's law may be in thy mouth, etc.—that is, that it may be the subject of frequent conversation and familiar knowledge among the people.
Other Jamieson, Fausset, and Brown entries containing Exodus 13:9:
Exodus 13:3
Deuteronomy 6:1-9
Isaiah 49:16
Micah 5:9
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