Ammianus Marcellinus Res Gestae 29.2.19

[19] A woman of Smyrna confessed before Dolabella, ¹ the proconsul of Asia, that she had poisoned her husband and her own son by him, because (as she said) she had discovered that they had killed her son by a former marriage; but she was ordered to appear again two days later. ² Since the council, to which according to custom the matter was referred, uncertain what distinction ought to be made between revenge and crime, hesitated to decide, she was sent before the Areopagites, those strict judges at Athens, whose justice is said to have decided disputes even among the gods. ³ They, after having considered the case, ordered the woman to appear before them with her accuser a hundred years later, since they did not wish either to acquit a poisoner or punish an avenger of her kindred; for that is never thought late which is the last of all things.