Musannaf Ibn Abi Shaybah 8730 — Gesturing in prayer

Sayyidah Aishah (may Allah be pleased with her) said: Once the Prophet (peace and blessings be upon him) was somewhat ill, and some of his Companions came to visit him. Meanwhile the time of prayer came, so he led them in prayer sitting. They began to pray standing, so he indicated to them by a gesture to pray sitting. So they sat down.