The Messenger of Allah (ﷺ) said: "I have been commanded to prostrate on seven and not to tuck up my hair or garment."
Sunan an-Nasa'i Book 12, Hadith 85
← Previous Hadith The Messenger of Allah (ﷺ) forbade three things: "Pecking like a crow, resting one's forearms on the ground like a predator, and allocating the same place for prayer like a camel gets used to a certain place."

Sunan an-Nasa'i Book 12, Hadith 84 Next Hadith → He saw 'Abdullah bin Al-Harith praying with his hair bound behind him. He stopped and started to undo it. When he finished he turned to Ibn 'Abbas and said: "What were you doing to my head?" He said: "I heard the Messenger of Allah (ﷺ) say: 'The likeness of this is that of one who prays with his hands tie behind his neck.'"

Sunan an-Nasa'i Book 12, Hadith 86