法苑珠林 68.27

68.27

又問。頗有非口業作而得成就妄語罪不。答言。有。如以身業作成就口業妄語之罪。

It also asks: 'Can one accomplish the sin of false speech through an action that is not vocal?' It answers: 'Yes, just as when one accomplishes the sin of vocal false speech through bodily action.'