Hadith 8:2420
Abu Bakr narrated to us, he said: Waki’ narrated to us, from Kathir ibn Zayd, from al-Muttalib ibn ‘Abd Allah, he said: The companions of the Messenger of Allah (may Allah bless him and grant him peace) used to raise their voices with the talbiyah until their voices became hoarse. And they used to expose themselves to the sun when they entered into the state of ihram.
حدثنا أبو بكر قال حدثنا وكيع عن كثير بن يزيد عن المطلب بن عبد الله قال كان أصحاب رسول الله صلى الله عليه وسلم يرفعون أصواتهم بالتلبية حتى تبح أصواتهم وكانوا يضحون للشمس إذا أحرموا