The Messenger of Allah ﷺ forbade a man from praying with his hair tied up in a knot.
حدثنا وكيع حدثنا سفيان عن مخول بن راشد عن رجل
نهى رسول الله ﷺ أن يصلي الرجل وشعره معقوص
Its chain of transmission is hasan, on account of Sharik, and the hadith has already appeared at 23746.