i found an answer if anyone was wondering the same thing here is a fatwa inshallah it is the correct opinion
Question
Assalaamalaikum sheikh, I came to know from many sources including your own website that great scholar like Imam Abu Hanifa prayed the fajr prayer with the wudu of isha prayer...
It is said amongst students of knowledge that Imam Ahmad Ibn Hanbal would pray 300 rakat daily as a young man and about 150 once he was older, and also many others such as Ali Ibn al-Hussein ibn `Ali ibn Abi Talib [Zayn al-Abideen d.94 A.H.]: "he prayed 1000 rak'as daily until he was buried."...