Invocations during Ruki' (bowing in prayer)

اللَّهُمَّ لَكَ رَكَعْتُ، وَبِكَ آمَنْتُ، وَلَكَ أَسْلَمْتُ، خَشَعَ لَكَ سَمْعِي، وَبَصَرِي، وَمُخِّي، وَعَظْمِي، وَعَصَبِي، [وَمَا استَقَلَّتْ بِهِ قَدَمِي]

Allāhumma laka rakaʿtu, wabika āmantu, walaka aslamtu, khashaʿa laka samʿī, wa baṣarī, wa mukhkhī, wa ʿaẓmī, wa ʿaṣabī, wamā staqallat bihi qadamī

O Allah, unto You I have bowed, and in You I have believed, and to You I have submitted. My hearing, sight, mind, bones, tendons and what my feet carry are humbled before You.