It is narrated from Abdullah bin Umar (may Allah be pleased with them both) that when the Messenger of Allah (ﷺ) began the prayer, he would raise his hands up to his shoulders, and when he raised his head from bowing (ruku‘), he would raise his hands in the same manner. However, during prostrations (sujood), he (ﷺ) would not raise his hands.
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 193
Hadith Takhrijأخرجہ البخاری، الأذان، باب رفع الیدین فی التکبیرۃ الأولی مع الافتتاح سواء: 735۔