Quintilian Institutio Oratoria 11.1.56

[56] For example, we even imagine cases where persons, either because of some overwhelming misfortune or repentance for some sin, demand from the senate the right to make an end of their lives; ¹ and in these cases it is obviously unbecoming not merely to adopt a chanting intonation, ² a fault which has also become almost universal, or to use extravagant language, but even to argue without an admixture of emotional appeal, so managed as to be even more prominent than the proof which is advanced. For the man who can lay aside his grief for a moment while he is pleading, seems capable even of laying it aside altogether