Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: I spent the night at the home of my maternal aunt Sayyidah Maymunah (may Allah be pleased with her). The Messenger of Allah (peace and blessings be upon him) got up at night and performed ablution (wudu), washing each part three times, then stood up to pray. So I also stood up and did what he (peace and blessings be upon him) had done, then I stood on his (peace and blessings be upon him) left, and he (peace and blessings be upon him) moved me to his right.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12451