It is narrated from Saib Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Jibreel (peace be upon him) came to me and instructed me to command my companions or those who are with me to raise their voices when reciting the Takbeer or the Talbiyah; they intend one of these two."
Hadith Referenceمسند الإمام الشافعي / كتاب الحج / 824
Hadith Takhrijاخرجه الترمذى الحج، باب ما جاء في رفع الصوت بالتلبية (829) وقال ”حسن صحيح“ والنسائي، مناسك الحج، باب رفع الصوت بالإهلال (2754) وابن ماجه المناسك باب رفع الصوت بالتلبية (2922) ۔ وصححه ابن خزيمة (2625) ، (2627) وابن الجارود (434) والحاكم (450/1)۔
It is narrated from Khuzaimah bin Thabit (may Allah be pleased with him) that he narrates from the Prophet (ﷺ) that when he would finish the Talbiyah, he would ask Allah Almighty for His pleasure and for Paradise, and by means of His mercy, seek protection from Hell.
Hadith Referenceمسند الإمام الشافعي / كتاب الحج / 827
Hadith Takhrijاسناده ضعيف لضعف شيخ الشافعى اخرجه البيهقي : 5 / 46 ۔ وفى المعرفة السنن والآثار له (2816) ۔ والبغوى (1866) ۔ والدارقطني: (2/ 238)۔