Narrated Ali ibn AbuTalib:

When the Messenger of Allah ﷺ stood for offering the obligatory prayer, he uttered the takbir (Allah is most great) and raised his hands opposite to his shoulders; and he did like that when he finished recitation (of the Qur'an) and was about to bow; and he did like that when he rose after bowing; and he did not raise his hands in his prayer while he was in his sitting position.

When he stood up from his prostrations (at the end of two rak'ahs), he raised his hands likewise and uttered the takbir (Allah is most great) and raised his hands so as to bring them up to his shoulders, as he uttered the takbir in the beginning of the prayer.

حَدَّثَنَا الْحَسَنُ بْنُ عَلِيٍّ، حَدَّثَنَا سُلَيْمَانُ بْنُ دَاوُدَ الْهَاشِمِيُّ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ أَبِي الزِّنَادِ، عَنْ مُوسَى بْنِ عُقْبَةَ، عَنْ عَبْدِ اللَّهِ بْنِ الْفَضْلِ بْنِ رَبِيعَةَ بْنِ الْحَارِثِ بْنِ عَبْدِ الْمُطَّلِبِ، عَنْ عَبْدِ الرَّحْمَنِ الأَعْرَجِ، عَنْ عُبَيْدِ اللَّهِ بْنِ أَبِي رَافِعٍ، عَنْ عَلِيِّ بْنِ أَبِي طَالِبٍ، - رضى الله عنه - عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ كَانَ إِذَا قَامَ إِلَى الصَّلاَةِ الْمَكْتُوبَةِ كَبَّرَ وَرَفَعَ يَدَيْهِ حَذْوَ مَنْكِبَيْهِ وَيَصْنَعُ مِثْلَ ذَلِكَ إِذَا قَضَى قِرَاءَتَهُ وَأَرَادَ أَنْ يَرْكَعَ وَيَصْنَعُهُ إِذَا رَفَعَ مِنَ الرُّكُوعِ وَلاَ يَرْفَعُ يَدَيْهِ فِي شَىْءٍ مِنْ صَلاَتِهِ وَهُوَ قَاعِدٌ وَإِذَا قَامَ مِنَ السَّجْدَتَيْنِ رَفَعَ يَدَيْهِ كَذَلِكَ وَكَبَّرَ . قَالَ أَبُو دَاوُدَ فِي حَدِيثِ أَبِي حُمَيْدٍ السَّاعِدِيِّ حِينَ وَصَفَ صَلاَةَ النَّبِيِّ ﷺ إِذَا قَامَ مِنَ الرَّكْعَتَيْنِ كَبَّرَ وَرَفَعَ يَدَيْهِ حَتَّى يُحَاذِيَ بِهِمَا مَنْكِبَيْهِ كَمَا كَبَّرَ عِنْدَ افْتِتَاحِ الصَّلاَةِ .