In Exodus 26:3-6, this signifies the reciprocal communication of truth with good and of good with truth. (Arcana Coelestia 9604)

8917. 'And the people saw and were violently shaken' means the quivering that takes place when they - Divine Truths - are received. This is clear from the meaning of 'being violently shaken' as quivering that takes place, at this point the kind of quivering there is when Divine Truths are received. Regarding that quivering, see 5459, 8816.