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5 And God called the light Day, and the darkness he called Night. And the evening and the morning were the first Day.
'A sandal tree' signifies aspects of the natural self.
(References: Apocalypse Explained 518)
6 Behold, I will stand before you there on the rock in Horeb. You shall strike the rock, and water will come out of it, that the people may drink." Moses did so in the sight of the elders of Israel.