trained = initiated or instructed, probably in the worship of Jehovah. Compare Gen_12:5; Gen_15:2; Gen_18:19; Gen_24:12-29; and Pro_22:6 (same word). 318 = a multiple of 6, the No. of "man". See App-10.
Dan. Not the Dan of Jdg_18:29, but a city in N. of Palestine long before the Danites changed the name of Laish.