O learned brāhmaṇa, the transcendental activities of the Lord are all wonderful, and they appear inconceivable because even great endeavors by many learned scholars have still proved insufficient for understanding them.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
नूनं भगवतो ब्रह्मन् हरेरद्भुतकर्मणः । दुर्विभाव्यमिवाभाति कविभिश्चापि चेष्टितम्
nūnaṃ bhagavato brahman hareradbhutakarmaṇaḥ | durvibhāvyamivābhāti kavibhiścāpi ceṣṭitam
SB 2.4.8