Samannaphalasutta 13.4

13.4

sace me bhagavā okāsaṃ karoti pañhassa veyyākaraṇāyā”ti.

Then the king bowed to the Blessed One, and stretching forth his joined palms in salutation to the Order took his seat aside, and said to the Blessed One: ‘I would fain question the Blessed One on a certain matter, if he give me opportunity to set forth the question.’
‘Ask, O king, whatsoever you desire.’