While prostrating

Subḥāna Rabbiya ‘l-a`lā. Glory is to my Lord, the Most High. (This is said three times in Arabic.) Reference: Abu Dawud, Ibn Majah, An-Nasa'i, At-Tirmidhi, and Ahmad. See also Al-Albani, Sahih At-Tirmidhi 1/83.
Subḥānaka Allāhumma Rabbanā wa biḥamdika Allāhumma ‘ghfir lī. Glory is to You, O Allah, our Lord, and praise is Yours. O Allah, forgive me. Reference: Al-Bukhari and Muslim, see invocation no. 34 above.
Subbūḥun, Quddūsun, Rabbu ‘l-malā'ikati warrūḥ. Glory (to You), Most Holy (are You), Lord of the angels and the Spirit. Reference: Muslim 1/533, see invocation no. 35 above.
Allāhumma laka sajadtu wa bika āmantu, wa laka aslamtu, sajada waj’hiya lilladhī khalaqahu, wa ṣawwarahu, wa shaqqa sam`ahu wa baṣarahu, tabārakallāhu 'aḥsanul-khāliqīn. O Allah, to You I prostrate myself and in You I believe. To You I have submitted. My face is prostrated to the One Who created it, fashioned it, and gave it hearing and sight. Blessed is Allah, the Best of creators Reference: Muslim 1/534 and others.
Subḥāna dhi ’l-jabarūti, wa ’l-malakūti, wa ‘l-kibriyā'i, wa ‘l-aẓamati. Glory is to the master of power, sovereignty, of majesty and greatness. Reference: Abu Dawud 1/230, An-Nasa'i, Ahmad. See also Al-Albani, Sahih Abu Dawud 1/166, see invocation no. 37 above.
Allāhumma’ghfir lī dhanbī kullahu, diqqahu wa jillahu, wa awwalahu wa ākhirahu wa `alāniyyatahu wa sirrahu. O Allah, forgive me all my sins, great and small, the first and the last, those that are apparent and those that are hidden. Reference: Muslim 1/350.
Allāhumma innī a`ūdhu biriḍāka min sakhaṭika, wa bimu`āfātika min `uqūbatika wa a`ūdhu bika minka lā uḥṣī thanā'an `alayka anta kamā athnayta `alā nafsika. O Allah, I seek protection in Your pleasure from Your anger, and I seek protection in Your forgiveness from Your punishment. I seek protection in You from You. I cannot count Your praises. You are as You have praised Yourself. Reference: Muslim 1/352.