The first season made it clear that the Vikings were quite ignorant of Christianity; yet, in this episode (s2;e2 3/6/14)) we have Jarl Borg virtually reciting Ecclesiastes 12:6, when, being perturbed upon Ragnar giving him the bad news that King Horik changed his mind about the agreement to raid together, he said:
"On this occasion, the silver thread is slit; the golden cup breaks, and the pail is smashed at the spring."
The Scripture version of that reads:
". . . the silver cord is severed, and the golden bowl is broken; before the pitcher is shattered at the spring, and the wheel broken at the well. . ." (New International Version).