From 1604 to 1962, the Roman Missal also prescribed that, at the words "mea culpa, mea culpa, mea maxima culpa", those reciting the "Confiteor" should strike their breast three times. Neither the original (1570) Tridentine edition of the Roman Missal nor the Vatican II editions (from 1970 on) specify the number of times. No edition specifies the form of the breast-beating, except to say that it is to be done with the right hand. That the hand should be clenched into a fist is stated by some and denied by others. Saint Augustine of Hippo said: "No sooner have you heard the word 'Confiteor', than you strike your breast. What does this mean except that you wish to bring to light what is concealed in the breast, and by this act to cleanse your hidden sins?" (Sermo de verbis Domini, 13), and Saint Jerome said: "We strike our breast, because the breast is the seat of evil thoughts: we wish to dispel these thoughts, we wish to purify our hearts" (In Ezechiel, xviii). This gesture of sorrow for sin is found in Scripture, as for instance in and .