Musannaf Ibn Abi Shaybah

Ayyub says that I saw Hazrat Qasim offering voluntary prayers between Zuhr and Asr in Arafat, and I saw Hazrat Salim; he did not offer them.

Hazrat Tawus did not offer voluntary prayers between Zuhr and Asr in Arafat.

It is narrated from Hazrat Jabir that the Holy Prophet (peace and blessings be upon him) performed the Zuhr and Asr prayers at Arafat and did not offer any voluntary prayers between them.

Hazrat Mujahid says that if you wish, you may offer nafl prayers in Arafat between Zuhr and Asr.

Hazrat Ata says that whoever performs the Zuhr and Asr prayers together at Arafat should not offer any voluntary prayers between them.

Ibrahim says that if the imam gives an opportunity to offer nafl (supererogatory) prayers, then definitely offer them.

Hazrat Ibn Sirin says that I saw Hazrat Ibn Umar (may Allah be pleased with them) did not offer nafl (voluntary) prayers between Zuhr and Asr in Arafat, and I saw Hazrat Qasim, he offered nafl prayers.

Hazrat Aswad used to offer voluntary prayers between Zuhr and Asr in Arafat.