Silsilah as-Sahihah 667 — Etiquettes of spitting during prayer

It is narrated from Sayyiduna Hudhaifah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When a person stands in prayer, Allah Almighty turns towards him with His Face. Therefore, the one praying should not spit in front of him, nor to his right side, because the angel who records good deeds is on his right side. (However), he should spit to his left side."