It is stated in a sūtra that Śākyamuni Buddha called such heavenly beings as the King of the Brahma Heaven, Indra, the sun, the moon, the Four Heavenly Kings, and dragons of this Sahā World as well as other worlds together and had them make written pledges in front of Himself, the Buddha of Many Treasures, and various Buddhas from other worlds throughout the universe, stating:

“In the Ages of the True, Semblance, and Latter Dharmas after the passing of Śākyamuni Buddha, evil spirits such as the king of devils in the Sixth Heaven and devils will enter the bodies of the king and his subjects, causing trouble to disciples of the Buddha regardless of whether or not they observe precepts or break them. If those heavenly beings who made written pledges to Buddhas see or hear about the troubled Buddha’s disciples but do nothing to punish the king and his subjects, the King of the Brahma Heaven and Indra will inevitably send a messenger to the Four Heavenly Kings ordering punishment for them. In case the community deities do not punish the king and his subjects who trouble Buddha’s disciples, such deities will be dealt with by the King of the Brahma Heaven, Indra and the Four Heavenly Kings. The same will be true with the King of the Brahma Heaven and Indra. The King of the Brahma Heaven, Indra and the Four Heavenly Kings in other worlds will never fail to punish their counterparts in this world, who do not carry out their promised duty. If they don’t, they will be unable to see Buddhas in the past, present and future lives, lose the ranks of the King of the Brahma Heaven and Indra forever, and fall into the Hell of Incessant Suffering.”

Kangyō Hachiman-shō, Remonstration with Bodhisattva Hachiman, Writings of Nichiren Shōnin, Doctrine 1, Page 261-262