SB 8.1.29
deva vaidhrtayo nama
vidhrtes tanaya nrpa
nastah kalena yair veda
vidhrtah svena tejasa
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
O King, in the Tamasa manvantara the sons of Vidhrti, who were known as the Vaidhrtis, also became demigods. Since in course of time the Vedic authority was lost, these demigods, by their own powers, protected the Vedic authority.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In the Tamasa manvantara there were two kinds of demigods, and one of them was known as the Vaidhrtis. The duty of the demigods is to protect the authority of the Vedas. The word devata refers to one who carries the authority of the Vedas, whereas Raksasas are those who defy the Vedic authority. If the authority of the Vedas is lost, the entire universe becomes chaotic. Therefore, it is the duty of the demigods, as well as kings and aides of governments, to give full protection to the Vedic authority; otherwise human society will be in a chaotic condition in which there cannot be peace or prosperity.