14 When you stand in prayer, cry in your soul: Have mercy on me, I am a sinner and weak; be gracious, O God, to my weakness, and grant strength to me to pray a prayer that shall be pleasing to Your Will. “Punish not mine enemies, take not vengeance on them that hate me; but grant them in Your grace that they may become doers of Your Will.” At the time of prayer and petition, continue in contemplations such as these continue. Bow your head before the Mighty One.
Source: On Admonition and Repentance (New Advent)