Musannaf Ibn Abi Shaybah 30744 — Testimony of zina: how is it given?

Ibn Sirin said: Some people testified against a man for zina (unlawful sexual intercourse). Sayyiduna Uthman (may Allah be pleased with him), making a gesture like this with his hand, said: Do you testify to this? And he inserted his index finger into his left finger and made the sign of the number ten.