'The shoulder' signifies all power. In Ezekiel 29:7, this signifies the power or faculty of understanding truth. 'To dwell between his shoulders,' as in Deuteronomy 33:12, signifies being in security and power.

(Odkazy: Arcana Coelestia 1085)

5414. 'And the sons of Israel came to buy in the midst of others who came' means the wish to acquire spiritual truths, like all other truths, through factual knowledge. This is clear from the meaning of 'the sons of Israel' as spiritual truths (for 'sons' are truths, see above in 5403, and 'Israel' is the celestial-spiritual man coming out of the natural, 4286, 4570, 4598, so that 'the sons of Israel' are spiritual truths within the natural); from the meaning of 'buying' as being acquired; and from the meaning of 'in the midst of others who came' as like all other truths, that is to say, ones acquired through factual knowledge.