AC 737 [2]As regards the number "six" in particular that it signifies combat is evident from the first chapter of Genesis, where the six days are described in which man was regenerated, before he became celestial, and in which there was continual combat, but on the seventh day, rest. It is for this reason that there are six days of labor and the seventh is the sabbath, which signifies rest. And hence it is that a Hebrew servant served six years, and the seventh year was free (Exod. 21:2; Deut. 15:12; Jer. 34:14); also that six years they sowed the land and gathered in the fruits thereof, but the seventh year omitted to sow it (Exod. 23:10-12), and dealt in like manner with the vineyard; and that in the seventh year was "a sabbath of sabbath unto the land, a sabbath of Jehovah" (Lev. 25:3, 4). As "six" signifies labor and combat, it also signifies the dispersion of falsities, as in Ezekiel: Behold six men came from the way of the upper gate which looketh toward the north, and everyone had his weapon of dispersion in his hand (Ezek. 9:2);
AC 7601 [4] From all this it can now be seen what is signified by the angels who were seen by men appearing in linen garments; as those spoken of in John: There went out from the temple the seven angels that had the seven plagues, clothed in linen white and shining, and girt about their breasts with golden girdles (Rev. 15:6). I lifted up mine eyes, and saw, and behold a man clothed in linen, whose loins were girded with gold of Uphas (Dan. 10:5). Behold six men came from a way of the upper gate, every man with his weapons of dispersion in his hand; but one man in the midst of them clothed in linen, and a scribe's ink horn on his loins (Ezek. 9:2); which angel is further mentioned in the same chapter (Rev. 15:3-4; 10:2-7). And in the same prophet we read of the angel who measured the new temple, who had a line of flax and a measuring reed in his hand (Ezek. 40:3). The angels also who were seen in the Lord's sepulcher appeared clothed in white, bright and shining (Matt. 28:3; Mark 16:5; Luke 24:4; John 20:11, 12).
Thank you, dear DaveMSmith, for those additional Swedenborgian insights!