This is a prayer upon the Prophet ﷺ composed by Habib Muhammad al-Haddar to be read by those visiting the Prophet Hud (peace be upon him).
اللَّهُمَّ صَلِّ و سَلِّمْ في كُلِّ لَحْظَةٍ أَبَداً عَدَدَ ذَرَّاتِ الوُجُود
عَلَى سَيِّدِنَا مُحَمَّدٍ و على نَبِيِّ اللهِ هُود و على آلِ سَيِّدِنَا مُحَمَّدٍ و على آلِ نَبِيِّ اللهِ هُود
‘O Allah, bestow prayers and peace in every instant for eternity upon our Master Muhammad and upon the Prophet of Allah, Hud, upon the family and followers of our Master Muhammad and upon the family and followers of the Prophet of Allah, Hud.’