Harokat pada surat almursalat

[Valey169]

{ ٱنطَلِقُوۤا۟ إِلَىٰ مَا كُنتُم بِهِۦ تُكَذِّبُونَ } [Surat Al-Mursalat: 29] Pada awal ayat tersebut berharokat pathah, kenapa tidak berharokat kasroh

[ahmedre]

This is an alif wasla, and is pronounced as a kasra as you mentioned. This is how it is rendered in the madani mushaf as printed by the King Fahd Glorious Quran Printing Complex.