Arcana Coelestia # 7092
7092. 'Send My people away' means that they should leave off molesting them. This is clear from the meaning of 'sending away' - when addressed to Pharaoh, who represents falsity that molests the Church's truths - as leaving off molestation; and from the representation of the children of Israel, to whom 'My people' refers here, as those belonging to the spiritual Church, dealt with in 6426, 6637.
Arcana Coelestia # 4401
4401. 'And he set up an altar there' means interior worship. This is clear from the meaning of 'setting up an altar' as worship, for the altar was the chief representative of the Lord, 921, 2777, 2811, and therefore the chief feature of worship. By worship here is meant interior worship originating in the Divine Spiritual, dealt with in the paragraph following this.