It was narrated from Malik bin Al-Huwairith that: He saw the Prophet (ﷺ) of Allah (ﷺ) raise his hands when he started to pray, and he narrated a similar report and added: "When he bowed he did likewise, and when he raised his head from bowing he did likewise, and when he raised his head from prostration he did likewise."
Source: sunnah.com
Other translations
Arabic
أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، قَالَ حَدَّثَنَا مُعَاذُ بْنُ هِشَامٍ، قَالَ حَدَّثَنِي أَبِي، عَنْ قَتَادَةَ، عَنْ نَصْرِ بْنِ عَاصِمٍ، عَنْ مَالِكِ بْنِ الْحُوَيْرِثِ، أَنَّ نَبِيَّ اللَّهِ صلى الله عليه وسلم كَانَ إِذَا دَخَلَ فِي الصَّلاَةِ فَذَكَرَ نَحْوَهُ وَزَادَ فِيهِ وَإِذَا رَكَعَ فَعَلَ مِثْلَ ذَلِكَ وَإِذَا رَفَعَ رَأْسَهُ مِنَ الرُّكُوعِ فَعَلَ مِثْلَ ذَلِكَ وَإِذَا رَفَعَ رَأْسَهُ مِنَ السُّجُودِ فَعَلَ مِثْلَ ذَلِكَ .
sunnah.com