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43 And the LORD said to Moses and Aaron, This is the ordinance of the passover: there shall no stranger eat of it.
'A headdress,' as in Exodus 28, signifies intelligence and wisdom.
(参考: Arcana Coelestia 10008)
28 Through faith he kept the passover, and the sprinkling of blood, lest he that destroyed the first-born should touch them.