Musannaf Ibn Abi Shaybah 7936 — People praying voluntary prayer

Ash'ath bin Abi al-Sha'tha' says: I was in Makkah in Ramadan in the time of Sayyiduna Abdullah bin al-Zubayr (may Allah be pleased with him), and I saw the imam leading a group separately in the tarawih while people were offering their own prayers in the corners of the mosque.