Bhagavad Gita 8.13 Chapter 8, Verse 13

ओमित्येकाक्षरं ब्रह्म व्याहरन्मामनुस्मरन् ।
यः प्रयाति त्यजन्देहं स याति परमां गतिम् ॥८.१३॥

omityekākṣaraṃ brahma vyāharanmāmanusmaran
yaḥ prayāti tyajandehaṃ sa yāti paramāṃ gatim

Meaning

uttering the one syllable Om, which is Brahman, and remembering me, whoever departs leaving the body reaches the supreme goal.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 8.13 (Chapter 8, The Yoga of the Imperishable Absolute, Verse 13)