Mahavagga, Khandaka 1, Chapter 62

1. At that time there was a certain person of an old family, whose kinsmen had died away; he was delicately nurtured. Now this person of an old family, whose kinsmen had died away, thought: 'I am delicately nurtured; I am not able to acquire new riches or to augment the riches which I possess. What shall I do in order that I may live a life of ease and without pain?'

Then this person of an old family, whose kinsmen had died away, gave himself the following answer: 'There are the Sakyaputtiya Samaṇas, who keep commodious precepts and live a commodious life; they have good meals and lie down on beds protected from wind. What if I were to procure myself an alms-bowl and robes on my own account, and were to have my hair and beard cut off, to put on yellow robes, to go to the Ārāma, and to live there with the Bhikkhus.'

2. Then that person of an old family, whose kinsmen had died away, procured himself an alms-bowl and robes on his own account, had his hair and beard cut off, put on yellow robes, went to the Ārāma, and respectfully saluted the Bhikkhus. The Bhikkhus said to him: 'How many years, friend, have elapsed since your upasampadā?'

“What does that mean, friends, "years elapsed since the upasampadā?"”

“And who is your upajjhāya, friend?”

“What does that word upajjhāya mean, friends?”

The Bhikkhus said to the venerable Upāli: 'Pray, friend Upāli, examine this ascetic.'

3. Then that person of an old family, whose kinsmen had died away, when being examined by the venerable Upāli, told him the whole matter. The venerable Upāli told this thing to the Bhikkhus; the Bhikkhus told this thing to the Blessed One.

'Let a person, O Bhikkhus, who has furtively attached himself to the Saṃgha, if he has not received the upasampadā ordination, not receive it; if he has received it, let him be expelled (from the fraternity).

'Let a person, O Bhikkhus, who has gone over to the Titthiyas' ( &c., as in chap. 61).