Bhagavad Gita 6.39

My Lord! You are worthy to solve this doubt once and for all; there is no one else competent to do so, save Yourself.

एतन्मे संशयं कृष्ण छेत्तुमर्हस्यशेषतः।
त्वदन्यः संशयस्यास्य छेत्ता न ह्युपपद्यते॥

etanme saṃśayaṃ kṛṣṇa chettumarhasyaśeṣataḥ|
tvadanyaḥ saṃśayasyāsya chettā na hyupapadyate||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).