Wa’il bin Hujr (may Allah be pleased with him) narrates that I saw the Messenger of Allah (peace and blessings be upon him), when he started the prayer, he would raise his hands up to his shoulders, and likewise when he bowed (for ruku‘) and when he raised his head from ruku‘ (he would also perform raf‘ al-yadayn). Wa’il (may Allah be pleased with him) says: “Then I came to him in the winter, and I saw (the noble Companions, may Allah be pleased with them, had wrapped themselves in sheets) and they would perform raf‘ al-yadayn from inside them.”
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 197
Hadith Takhrijأخرجہ ابو داود، الصلاۃ، باب رفع الیدین فی الصلوۃ: 726، 727 - والنسائی، الافتتاح، باب موضع الیمین من الشمال فی الصلاۃ: 890 - وصححہ ابن خزیمہ: 480، 714، 690 - وابن الجارود: 208۔