TgO Ex23:1 :לָא תְשַוֵי יְדָך עִם חַייָבָא לְמִהוֵי לֵיה סָהִיד שַקָר‏ : do not join forces with a sinner to be a lying witness for him
See the entire entry for šaqqār, šaqqārā n.m./adj. liar