Hippolytus, Ante-Nicene Fathers Vol. V, Hippolytus… (1885)
“ And certain other (heretics) , contentious by nature, (and) wholly uninformed as regards knowledge, as well as in their manner more (than usually) quarrelsome, combine (in maintaining) that Easter should be kept on the fourteenth day [1] of the first month, according to the commandment of the law, on whatever day (of the week) it should occur. (But in this) they only regard what has been written in the law, that he will be accursed who does not so keep (the commandment) as it is enjoined. ”
