Sojong (Wyl. gso sbyong; Skt. poṣadha; Pal. uposatha) 'Healing and Purification' — the bimonthly practice of confession observed by members of the monastic community. On sojong days the observance of the eight vows of sojong or the practice of Narak Kong Shak are recommended.
In Patrul Rinpoche's How to Keep the Eight One-Day Vows of a Layperson (bsnyen gnas yan lag brgyad pa'i sdom pa srung thabs) it says:
- The 'Second Buddha' of Oddiyana said:
- All harmful deeds are perfectly purified in this.
- Since it restores (so) and purifies (jong) negativity completely
- The Tathagata has called this the practice of Sojong.
- This is clearly a reference to Guru Padmasambhava and others have attributed this quote to the dge tshul gyi lo dri ba, which is sometimes said to have been composed by Padmasambhava (although it has also been attributed to Sanghabhadra and even Atisha). However, this verse is not to be found in extant versions of that text preserved in the Tengyur. Others have suggested that the quote should properly be attributed to Vasubandhu, who is also known as the 'Second Buddha', but this is clearly not Patrul Rinpoche's intention as his reference to Oddiyana shows.
- o rgyan sangs rgyas gnyis pa'i zhal nas/ dge ba mtha' dag yang dag gso ba dang/ sdig pa ma lus rnam par sbyong ba ste/ dge gsos phyir dang sdig pa rnam sbyong phyir/ de bzhin gshegs pas gso sbyong bka' stsal to// in dpal sprul gsung 'bum 2003, vol. ga, p. 149
- sdig pa mtha' dag yang dag 'dir sbyong ba/ de gso phyir dang sdig pa rnam sbyong phyir/ de bzhin gshegs pas gso sbyong zhes gsungs so// Note that it says de gso rather than dge gso.