Ab urbe condita

Titus Livius (Livy)

Livy. History of Rome, Volumes 1-2. Roberts, Canon, Rev, translator. London, New York: J. M. Dent and Sons; E. P. Dutton and Co., 1912.

Sextus had remained behind in Rome and to keep him in ignorance of this oracle and so deprive him of any chance of coming to the throne, the two Tarquins insisted upon absolute silence being kept on the subject. They drew lots to decide which of them should be the first to kiss his mother.

On their return to Rome, Brutus, thinking that the oracular utterance had another meaning, pretended to stumble, and as he fell kissed the ground, for the earth is of course the common mother of us all.

Then they returned to Rome, where preparations were being energetically pushed forward for a war with the Rutulians