3797. 'And the flock of Laban his mother's brother' means the Church and doctrine from that origin. This is clear from the meaning of 'the flock' as the Church and doctrine, dealt with in 3767, 3768, 3783. The reason why Laban is also called 'his mother's brother' here is that this phrase again means acknowledgement of the origin, as in the previous paragraph.
Numbers 18:2
2
And thy brethren also of the tribe of Levi, the tribe of thy father, bring thou with thee, that they may be joined unto thee, and minister unto thee: but thou and thy sons with thee shall minister before the tabernacle of witness.