‘Aun b. ‘Abdallah reported on the authority of Ibn Mas'ud that God’s Messenger said:

When one of you bows and says three times while doing so, “Glory be to my mighty Lord”, his bowing is complete; and that is the least which effects this. When he prostrates himself and says three times while doing so, “Glory be to my most high Lord”, his prostration is complete; and that is the least which effects this. Tirmidhi, Abu Dawud and Ibn Majah transmitted it, but Tirmidhi said that its <i>isnad</i> is not connected, because ‘Aun did not meet Ibn Mas'ud.

وَعَنْ عَوْنِ بْنِ عَبْدِ اللَّهِ عَنِ ابْنِ مَسْعُودٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ:

إِذَا رَكَعَ أَحَدُكُمْ فَقَالَ فِي رُكُوعِهِ: سُبْحَانَ رَبِّيَ الْعَظِيمِ ثَلَاثَ مَرَّاتٍ فَقَدْ تَمَّ رُكُوعُهُ وَذَلِكَ أَدْنَاهُ وَإِذَا سَجَدَ فَقَالَ فِي سُجُودِهِ سُبْحَانَ رَبِّيَ الْأَعْلَى ثَلَاثَ مَرَّاتٍ فَقَدْ تَمَّ سُجُودُهُ وَذَلِكَ أَدْنَاهُ

. رَوَاهُ التِّرْمِذِيُّ وَأَبُو دَاوُد ابْن مَاجَهْ. وَقَالَ التِّرْمِذِيُّ: لَيْسَ إِسْنَادُهُ بِمُتَّصِلٍ لِأَنَّ عونا لم يلق ابْن مَسْعُود