Sayyiduna Anas (may Allah be pleased with him) narrates: At first the Prophet (peace and blessings be upon him) used to let his hair fall straight back (that is, he did not part it). He kept doing so for as long as Allah willed, then later he began to part it.
Ahmad recorded it, and its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب اللباس / 8830
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه احمد فى المسند (215/3) ، أخرجه مسند أحمد برقم: 12842»