'Ali Radiyallahu 'Anhu used to perform four rak'ahs before zuhr and used to say:
"Rasulullah Sallallahu 'Alayhi Wasallam also performed these four rak'ahs after zawaal, and recited long verses therein". (ID)
English reference (ID): Book 40, Hadith 279 (ID)
Arabic reference (ID): Book 41, Hadith 296 (ID)