The reciter: Ahmad ibn Yunus narrated to us, saying: Ibrahim ibn Sa'd narrated to us, saying: Ibn Shihab narrated to us from 'Ubayd Allah ibn 'Abd Allah from Ibn 'Abbas (may Allah be pleased with them both), who said:
The Prophet (ﷺ) used to copy the people of the Scriptures in matters in which there was no order from Allah. The people of the Scripture used to let their hair hang down while the pagans used to part their hair. So the Prophet (ﷺ) let his hair hang down first, but later on he parted it.
كان النبي صلى الله عليه وسلّم يحب موافقة أهل الكتاب فيما لم يؤمر فيه، وكان أهل الكتاب يسدلون أشعارهم، وكان المشركون يفرقون رءوسهم، فسدل النبي صلى الله عليه وسلّم ناصيته، ثم فرق بعد Sahih al-Bukhari 5917.