Matsyapurana 94.8

94.8

dhūmrā dvibāhavaḥ sarve gadino vikṛtānanāḥ
gṛdhrāsanagatā nityaṃ ketavaḥ syurvarapradāḥ //

The image of Râhu should be made, having a terrible mouth or appearance, seated on a blue-colored lion, having four hands, armed with a sword, a leather shield, a spear, and the fourth hand raised in the posture of giving blessings. The image of Kêtu should be made of smoky color, with a vulture for His conveyance and having two hands—one hand holding a mace and the other raised in the posture of giving blessings, and having a distorted face.—7-8.