Coffman Commentaries on the Bible - Genesis 17:9-10
"And God said unto Abraham, And as for thee, thou shalt keep my covenant, thou, and thy seed after thee throughout their generations. This is my covenant, which ye shall keep, between me and you and thy seed after thee: every male among you shall be circumcised.""And as for thee ..." This reaches back to Genesis 17:4, where God stated his part of the covenant. Here he began to recount the obligations that pertained to Abraham and his posterity."Every male among you ... shall be circumcised ..."... read more
E.W. Bullinger's Companion Bible Notes - Genesis 17:12
eight = the number of Resurrection ( App-10 ); associated here with circumcision, the sign of death. read more