Adapted from the Translation by T. W. Rhys Davids and Hermann Oldenberg
SECOND KHANDHAKA (THE UPOSATHA CEREMONY, AND THE PATIMOKKHA)
Chapter-23 : Sickness during Ceremony - II
Then the Blessed One thus addressed the Bhikkus: 'Assemble, O Bhikkhus(Monks), the Sangha will perform an (official) act.' When he had spoken thus, a certain Bhikkhu said to the Lord Buddha: 'there is a sick Bhikkhu, Lord, who is not present.'
'I prescribe, O Bhikkhus(Monks), that a sick Bhikkhu is to declare (lit. to give) his consent (to the act to be performed), &c. I prescribe, O Bhikkhus(Monks), that on the day of Uposatha he who declares his parisuddhi is to declare his consent (to official acts to be performed eventually) also, for (both declarations) are required for the Sangha (and for the validity of its acts).