Ya Zallazi Kana Qabla Kulli Shay

In his book of al-Muqniah, Shaykh al-Mufid has narrated on the authority of Ali ibn Mahziyar that Imam Muhammad Taqi (as) said that it is recommended to recite the following supplication as many times as possible throughout the days and nights of the month of Ramadhan:

يَا ذَا الّذِي كَانَ قَبْلَ كُلّ شَيْءٍ،
O He Who has been always there before all things,
ثُمّ خَلَقَ كُلّ شَيْءٍ،
And He then created all things,
ثُمّ يَبْقَى وَيَفْنَى كُلّ شَيْءٍ،
And He then stays while all things vanish.
يَا ذَا الّذِي لَيْسَ كَمِثْلِهِ شَيْءٌ،
O He Whose like in not found at all
وَيَا ذَا الّذِي لَيْسَ فِي السّمَاوَاتِ العُلَى،
O He; neither in the highest heavens,
وَلا فِي الأَرَضِينَ السّفْلَى،
Nor in the lowest layers of the earth
وَلا فَوْقَهُنّ وَلا تَحْتَهُنّ وَلا بَيْنَهُنّ إلهٌ يُعْبَدُ غَيْرُهُ،
Nor above them, nor beneath them, nor there is between them any god that is worshipped save Him.
لَكَ الحَمْدُ حَمْداً لا يَقْوَى عَلَى إحْصَائِهِ إلاَّ أَنْتَ،
To You be the praise that none can count save You,
فَصَلّ عَلَى مُحَمّدٍ وَآلِ مُحَمّدٍ صَلاةً لا يَقْوَى عَلَى إحْصَائِهَا إلاَّ أَنْتَ.
So, please bless Muhammad and the Household of Muhammad with the blessings that none can count save You.