It is narrated from Rifaa’ah bin Rafi’ (may Allah be pleased with him) that a man entered the mosque and began to pray near the Messenger of Allah (ﷺ). (When he completed his prayer) he came to the Prophet (ﷺ) and greeted him with salam. The Prophet (ﷺ) said: “Repeat your prayer, for you have not prayed.” The man stood up and prayed in the same manner as before. The Prophet (ﷺ) again said: “Repeat your prayer, for you have not prayed.” He said: O Messenger of Allah (ﷺ)! Teach me, how should I pray? The Prophet (ﷺ) said: “When you stand for prayer, face the qiblah and say Allahu Akbar, then recite Surah Al-Fatihah and whatever (portion) of the Qur’an Allah has made easy for you. When you bow (in ruku’), place your palms on your knees, perform your ruku’ with calmness, and straighten your back. When you rise, straighten your back and raise your head until the bones return to their joints. When you prostrate, prostrate with calmness, and when you rise, sit on your left thigh. Then perform every ruku’ and prostration with calmness in the same way.”
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 221
Hadith Takhrijاسنادة ضعيف لشدة ضعف شيخ الشافعي، لكنه صح من غير هذا الطريق، اخرجه ابو داود، الصلاة، باب صلاة من لا يقيم صلبه في الركوع والسجود: 858 و ابن ماجة، الطهارة، باب ماجاء في الوضوء على ما امر الله تعالى: 460 - والنسائي التطبيق، باب الرخصة في ترك الذكر في السجود: 1137 - وصححه ابن خزيمة: 545 ، 597، 638 ـ والحاكم 1/ 241 - 242.