'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". (ES)
English reference (ES): Book 40, Hadith 279 (ES)
Arabic reference (ES): Book 41, Hadith 296 (ES)