Conan The Barbarian Annuals (1973-1987) #8

Plot

Kull and his Red Slayers try to stop worshippers of the nameless serpent god from sacrificing a young woman who has just given birth to the avatars of their god, a twin son and daughter; Knowing the children are a grave danger to the world, Kull commands Tu to slay the babes but his trusted advisor finds he doesn't have the heart for it and gives the siblings to a passing shepherd; Ten thousand years later, Conan deals with the consequences of this action.