Now Cicero was a friend of Clodius

Now Cicero was a friend of Clodius, and in the affair of Catilina found him a most zealous assistant and guardian of his person; but as Clodius in answer to the charge relied on not having been in Rome at the time, and maintained that he was staying in places at a very great distance, Cicero bore testimony that Clodius had come to his house and spoken with him on certain matters; which was true. However people did not suppose that Cicero gave his testimony from regard to truth, but by way of justifying himself to his wife Terentia. For Terentia had a grudge against Clodius on account of his sister Clodia, who was supposed to wish to marry Cicero, and to be contriving this by the aid of one Tullus, who was one of the nearest companions and intimates of Cicero, and as Tullus was going to Clodia, who lived near, and paying attention to her, he excited suspicion in Terentia. Now as Terentia was of a sour temper and governed Cicero, she urged him to join in the attack on Clodius and to give testimony against him. Many men also of the highest character charged Clodius by their testimony with perjury, disorderly conduct, bribing of the masses, and debauching of women. Lucullus also produced female slaves to testify that Clodius had sexual commerce with his youngest sister when she was the wife of Lucullus. There was also a general opinion that Clodius debauched his other two sisters, of whom Marcius Rex had Terentia and Metellus Celer had Clodia to wife, who was called Quadrantaria, because one of her lovers put copper coins for her in a purse pretending they were silver and sent them to her; now the smallest copper coin the Romans called Quadrans. It was with regard to this sister that Clodius was most suspected. However as the people on that occasion set themselves against those who bore testimony and combined against Clodius, the judices being afraid procured a guard for their protection, and most of them gave in their tablets with the writing on them confused. It turned out that those who were for acquitting him were the majority, and some bribery was also said to have been used. This led Catulus to say when he met the judices, “Indeed you did ask for a guard to protect you, for you were afraid that some one should take your money from you.” Upon Clodius saying to Cicero that his evidence had no credit with the judices, Cicero replied, “However, five-and-twenty of the judices gave me credit, for so many of them voted against you; but thirty of them gave you no credit, for they did not vote for your acquittal till they had received their money.” Cæsar, however, when called, gave no evidence against Clodius, and he denied that he had convicted his wife of adultery, but that he had put her away, because Cæsar’s wife ought not only to be free from a shameful act, but even the report of it.

Plutarco. Vidas paralelas: Cicerón, 29.