Bhagavatapurana 4.29.57

4.29.57

saṃśayo 'tra tu me vipra sañchinnas tat-kṛto mahān /
ṛṣayo 'pi hi muhyanti yatra nendriya-vṛttayaḥ //

57. On this point my great doubt caused by them (teachers) is solved: still there lingers a doubt; for even Rishis are bewildered in respect of those things which the sense-activities do not reach.