سنن النسائي 876

It was narrated that Ibn Umar said:I saw the Messenger of Allah (ﷺ) when he said the opening Takbir of the prayer, raise his hands until they were level with his shoulders. When he said the Takbir before bowing he did likewise, and when he said: 'Sami Allahu liman hamidah (Allah hears those who praise Him),' he did likewise, then he said: 'Rabbana wa lakal-hamd (Our Lord, to You be praise).' But he did not do that when he prostrated or when he raised his head from prostration

Rapporté par Ibn Umar : J’ai vu le Messager d’Allah (ﷺ), lorsqu’il disait le takbir d’ouverture de la prière, lever les mains à la hauteur de ses épaules. Quand il disait le takbir avant de s’incliner, il faisait de même, et quand il disait : “Sami Allahu liman hamidah (Allah entend celui qui Le loue)”, il faisait de même, puis il disait : “Rabbana wa lakal-hamd (Notre Seigneur, à Toi la louange).” Mais il ne faisait pas cela lors de la prosternation ni lorsqu’il relevait la tête de la prosternation