As-Salaam alaikum,
Umm Habiba, may Allah be pleased with her, said that the Noble Messenger of Allah, Sallallahu alaihi Wasallam, said:--

"Whoever prays 4 raka'at [nawafil] before zuhr and 4 after it,
Allah makes him prohibited for the Fire."
(Abu Dawud 1269, Tirmidhi 427 and An-Nisa'i 1818).