Tevijjasutta 1.20

1.20

‘And just even so, Vāseṭṭha though you I say that the Brahmans are not able to point out the way to union with that which they have seen, and you further say that neither any one of them, nor of their pupils, nor of their predecessors even to the seventh generation has ever seen Brahmā. And you further say that even the Rishis of old, whose words they hold in such deep respect, did not pretend to know, or to have seen where, or whence, or whither Brahmā is. Yet these Brahmans versed in the Three Vedas say, forsooth, that they can point out the way to union with that which they know not, neither have seen Now what think you, Vāseṭṭha? Does it not follow that, this being so, the talk of the Brahmans, versed though they be in the Three Vedas, is foolish talk?’
‘In sooth, Gotama, that being so, it follows that the talk of the Brahmans versed in the Three Vedas is foolish talk!’
‘Very good, Vāseṭṭha. Verily then, Vāseṭṭha, that Brahmans versed in the Three Vedas should be able to show the way to a state of union with that which they do not know, neither have seen—such a condition of things can in no wise be.’