Mahavagga, Khandaka 4, Chapter 2

1. At. that time the Chabbaggiya Bhikkhus, while the senior Bhikkhus were crouching down and were performing their Pavāraṇā, remained on their seats. The moderate Bhikkhus were annoyed, murmured, and became angry: 'How can the Chabbaggiya Bhikkhus remain on their seats, while the senior Bhikkhus crouch down, and perform their Pavāraṇā?'

Those Bhikkhus told the thing to the Blessed One.

“Is it true, O Bhikkhus, that the Chabbaggiya Bhikkhus, &c.?”

“It is true, O Lord.”

Then the blessed Buddha rebuked them: 'How can these foolish men, O Bhikkhus, remain on their seats (&c., as above)? This will not do, O Bhikkhus, for converting the unconverted (&c., as in chap. 1, § 13).'

Having rebuked them and delivered a religious discourse, he thus addressed the Bhikkhus: 'Let no one, O Bhikkhus, remain on his seat, while the senior Bhikkhus crouch down, and perform their Pavāraṇā. He who does, commits a dukkaṭa. offence. I prescribe, O Bhikkhus, that all of you crouch down while Pavāraṇā is being performed.'

2. At that time a certain Bhikkhu weak from age, who waited crouching till all had finished their Pavāraṇā, fell down fainting.

They told this thing to the Blessed One.

“I prescribe, O Bhikkhus, that (every Bhikkhu) crouches down the whole while till he has performed his Pavāraṇā, and sits down on his seat when he has performed it.”