四分律刪繁補闕行事鈔 3.44

3.44

The Mahāsāṃghika-vinaya states: It may be spread out to sit upon. When walking on the road, it may be folded lengthwise and folded in half, placed upon the robe bag, and carried on the left shoulder. When arriving at a sitting place, one should spread it out and sit. If placing it in its original location, fold it in the middle, and afterward gently unfold it and sit. For the general method of sitting, one should first press with the hand and only then sit down. The Sutra of the Wise and the Foolish states: Śāriputra placed the niṣīdāna on his left shoulder, entered the assembly, and subdued the heretics. The Vinaya [piṭaka] has many texts about placing it on the shoulder when entering the mountains to practice dhyāna. Placing it on the left arm today is definitely non-Dharmic.