The Prophet ﷺ would pray while I was beside him, and sometimes his garment would touch me when he prostrated.
حدثنا أبو بكر بن أبي شيبة حدثنا عباد بن العوام عن الشيباني عن عبد الله بن شداد قال حدثتني
كان النبي ﷺ يصلي وأنا بحذائه وربما أصابني ثوبه إذا سجد
Reported by Bukhari, Prayer, chapter (30), hadith 333, 517, 381, 379, 518, and Muslim, Prayer, chapter on passing in front of one who is praying, hadith 513, from Ibn Abu Shayba and others, from the hadith of Shaybani, with this wording, and Mosques, chapter on the permissibility of congregational prayer in supererogatory prayers... etc., hadith 513.