Shama-il Tirmidhi Chapter 40, Hadith Number 8 (279).

‘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”.

Imaam Ghazaali has stated in his Ihya ‘Ulumid Deen, that it is desirable to recite the Surah Baqarah in these four rak’ahs, or a similar surah which consists of more than a hundred aayaat, so that a sunnah of Sayyidina Rasulullah Sallallahu ‘Alayhi Wasallam could be practised in reciting a lengthy portion.