Uthman bin Abdullah reported,

My family sent me to Umm Salama with a cup of water, in which there were some strands of the Prophet's ﷺ hair. Whenever someone was afflicted by the evil eye or some other ailment, they would send their vessel to her. I looked into the small container and saw a few reddish hairs.

Azami 9402

Sahih

عن عثمان بن عبد الله بن موهب قال

أرسلني أهلي إلى أم سلمة بقدح من ماء، وفيه شعر من شعر النبي ﷺ، وكان إذا أصاب الإنسان عين، أو شيء بعث إليها مخضبه، فاطلعت في الحجل، فرأيت شعرات حمرا.

الأعظمي 9402صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Biography of the Prophet ﷺ
Chapter
Seeking blessings from the Prophet ﷺ and his relics
Section
Seeking blessings from the relics of the Prophet ﷺ
Numbering
Jami al-Kamil 9402 (2nd edition)
Azami 9402