He saw the Messenger of Allah ﷺ wipe his head until he reached the back of the head and the area adjoining it at the front of the neck, doing so once. He said, the qadhal is the side of the neck.
حدثنا عبد الصمد بن عبد الوارث قال حدثني أبي قال حدثنا ليث
أنه رأى رسول الله ﷺ يمسح رأسه حتى بلغ القذال وما يليه من مقدم العنق مرة قال القذال السالفة العنق
No references are available.
Its isnad is daif due to the unknown status of Talha's father, that is, the unknown status of Musarrif bin Amr. The hadith appears in Abu Dawud 1/32, no. 132, in the chapter on Purification, on the description of the Prophet's ﷺ wudu, with its wording and its chain.