Shaheed (may Allah have mercy on him) in his book ''Zikra'' said: Ibn Abi Aqeel has chosen this supplication base on what has been narrated from the commander of the faithful (peace be upon him) concerning Qunut:

اَللّٰهُمَّ اِلَيْكَ شَخَصَتِ الْاَبْصَارُ، وَنُقِلَتِ الْاَقْدَامُ، وَرُفِعَتِ الْاَيْدِيْ، وَمُدَّتِ الْاَعْنَاقُ، وَاَنْتَ دُعِيْتَ بِالْاَلْسُنِ، وَاِلَيْكَ سِرُّهُمْ وَنَجْوَاهُمْ فِي الْاَعْمَالِ، رَبَّنَا افْتَحْ بَيْنَنَا وَبَيْنَ قَوْمِنَا بِالْحَقِّ وَاَنْتَ خَيْرُ الْفَاتِحِيْنَ۔

اَللّٰهُمَّ اِنَّا نَشْكُوْ اِلَيْكَ غَيْبَةَ نَبِيِّنَا وَقِلَّةَ عَدَدِنَا، وَكَثْرَةَ عَدُوِّنَا، وَتَظَاهُرَ الْاَعْدَاۤءِ عَلَيْنَا، وَوُقُوْعَ الْفِتَنِ بِنَا، فَفَرِّجْ ذٰلِكَ اللّٰهُمَّ بِعَدْلٍ تُظْهِرُهُ، وَاِمَامِ حَقٍّ تُعَرِّفُهُ، اِلٰهَ الْحَقِّ اٰمِيْنَ رَبَّ الْعَالَمِيْنَ۔

He said: it gets to me that Imam Sadiq (peace be upon him) use to command his followers to observe this supplication in their Qunut after reciting the words of relief (Faraj).[1]