While bowing in prayer

سُبْـحانَ رَبِّـيَ الْعَظـيم (ثلاث مرات)

Subḥāna Rabbiyal-`Aẓīm.[three times] Glory to my Lord the Exalted (three times in Arabic) Reference: Abu Dawud, Ibn Majah, An-Nasa'i, At-Tirmidhi, and Ahmad. See Al-Albani's Sahih At-Tirmidhi 1/83.

Reference : Hisn al-Muslim 33

سُبْـحانَكَ اللّهُـمَّ رَبَّـنا وَبِحَـمْدِك ، اللّهُـمَّ اغْفِـرْ لي

Subḥānaka Allāhumma Rabbanā wa biḥamdika Allāhum-maghfir lī. Glory is to You , O Allah , our Lord , and praise is Yours . O Allah , forgive me. Reference: Al-Bukhari 1/99, Muslim 1/350.

Reference : Hisn al-Muslim 34

سُبـّوحٌ قُـدّْوس ، رَبُّ الملائِكَـةِ وَالـرُّوح

Subbūḥun, Quddūsun, Rabbul-malā'ikati warrūḥ. Glory (to You) , Most Holy (are You) , Lord of the angels and the Spirit. Reference: Muslim 1/353, Abu Dawud 1/230.

Reference : Hisn al-Muslim 35

اللّهُـمَّ لَكَ رَكَـعْتُ وَبِكَ آمَـنْت، ولَكَ أَسْلَـمْت ، خَشَـعَ لَكَ سَمْـعي، وَبَصَـري ، وَمُخِّـي، وَعَظْمـي، وَعَصَـبي ، وَما استَقَـلَّ بِهِ قَدَمي

Allāhumma laka raka`tu, wa bika 'āmantu, wa laka 'aslamtu khasha`a laka sam`ee wa baṣarī, wa mukhkhī, wa `aẓmī, wa `aṣabī, wa mastaqalla bihi qadamī. O Allah , to You I bow (in prayer) and in You I believe and to You I have submitted. Before You my hearing is humbled, and my sight, and my mind, my bones, my nerves and what my feet have mounted upon (for travel). Reference: Muslim 1/534, Abu Dawud, An-Nasa'i and At- Tirmidhi.

Reference : Hisn al-Muslim 36

سُبْـحانَ ذي الْجَبَـروت، والمَلَـكوت، وَالكِبْـرِياء، وَالْعَظَـمَةِ

Subḥāna dhil-jabarūti, walmalakūti, walkibriyā'i, wal`aẓamati. Glory is to You, Master of power, of dominion, of majesty and greatness. Reference: Abu Dawud 1/230, An-Nasa'i and Ahmad. Its chain of narration is good (Hasan).

Reference : Hisn al-Muslim 37