Musannaf Ibn Abi Shaybah 27187 — Reports on the prohibition

Tariq bin Shihab said: There was a bitter exchange between Sayyiduna Khalid bin al-Walid and Sayyiduna Sa'd (may Allah be pleased with them both), and a man began to speak ill of Sayyiduna Khalid in the presence of Sayyiduna Sa'd. Sayyiduna Sa'd said: Stop! The quarrel that is between us does not reach our religion!