四分律比丘含注戒本 2.137

2.137

(The Buddha was in Śrāvastī. The group-of-six and the group-of-seventeen were traveling on the same road. Arriving at a place without lodgings, the group-of-seventeen sought lodgings on their own. The group-of-six, knowing that they had sought and obtained a lodging, forcibly spread their bedding between them and lodged there. The bhikṣus reported the offense to the Buddha, who on this basis formulated this precept.)