Matsya Purana 266.20

266.20

nyāsamantrānato vakṣye lokapālātmakāniha.
indrastu sahasā dīptaḥ sarvadevādhipo mahān .. 266.19

The following are the Nyāsa mantras for the consecration of the Lokapâlas, viz:—The most valiant Indra is the Lord of the Devas He is armed with a thunderbolt and is always illumined by His fire I salute Him every day Agni is red, is the emblem of all the Devas, conjoint with flashes has smoke for His banner, unbearable to all, I salute Him, the presiding Person in the fire.—19-21