Pratimoksha of the Dharmaguptakas 1.59

1.59

「若比丘！作新坐具，當取故者，縱廣一磔手，帖著新者上，用壞色故。若作新坐具，不取故者，縱廣一磔手，帖著新者上，用壞色故，尼薩耆波逸提。

If a monk make a new seat-cover, he ought to take an old piece, one span in length and breadth, and patch it over the new, in order to destroy its appearance; if in making a new seat-cover he does not follow his rule it is nissaghiya patchittiya.