Bhagavatapurana 5.12.4

5.12.4

yad āha yogeśvara dṛśyamānaṃ kriyā-phalaṃ sad-vyavahāra-mūlam /
na hy añjasā tattva-vimarśanāya bhavān amuṣmin bhramate mano me //

4. O Lord of yoga, it was said (by Thee) that the perceptible world of action and its fruit, though apparently real, is but a word at the bottom and that I am not wholly competent to hold a search into the truth: and about this matter my mind wanders (is bewildered).