It is narrated from Anas bin Malik (may Allah be pleased with him) that when the Prophet (peace and blessings be upon him) had his head shaved on the Day of Sacrifice, he (peace and blessings be upon him) held his hair in his right hand. When the barber had shaved the right side, he (peace and blessings be upon him) said to Anas (may Allah be pleased with him): "Take this hair to Abu Talhah (may Allah be pleased with him) and Umm Sulaym (may Allah be pleased with her)." When the people saw this special favour of his (peace and blessings be upon him), they too became eager for his (peace and blessings be upon him) hair: one took a tuft, and another took some hairs.
(b) Ubaydah al-Salmani (may Allah have mercy on him) said: This hair is dearer to me than all the gold and silver that is on the surface of the earth and within it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4233