Prayers and Meditations — Paragraph 603
Source (Arabic)
المُقْتَدِرُ عَلَى ما تَشاءُ وَإِنَّكَ أَنْتَ المُهَيْمِنُ القَيُّومُ.
Translation
Thou art, verily, powerful to do Thy pleasure. Thou art, in truth, the Help in Peril, the Self-Subsisting.