Arcana Coelestia#8493
8493. 'This is what Jehovah has spoken' means influx from the Divine. This is clear from the consideration that Jehovah or the Lord instructs by means of influx, and that this is expressed in the historical narratives of the Word by 'saying' and 'speaking'. 'Speaking' means influx in other places as well, see 2951, 5481, 5797, 7270, 8128.
Arcana Coelestia#8128
8128. 'Speak to the children of Israel' means the influx of God's truth among those belonging to the spiritual Church. This is clear from the meaning of 'speaking' as influx, dealt with in 2951, 5481, 5797, 7270; and from the representation of 'the children of Israel' as those who belong to the spiritual Church, dealt with in 6426, 6637, 6862, 6868, 7035, 7062, 7198, 7201, 7215, 7223. The reason why 'speaking' means influx is that in the internal representative sense 'Moses' is Divine Truth, and Divine Truth enters a person's perception and thought through influx. Thought as a result of perception is inward speech, to which outward speech corresponds; and for that reason the former kind of speaking is meant in the internal sense by the latter.