SB 5.25.3
yasya ha va idam kalenopasañjihirsato ’marsa-viracita-rucira-bhramad-bhruvor antarena sankarsano nama
rudra ekadasa-vyuhas try-aksas tri-sikham sulam uttambhayann udatisthat.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
At the time of devastation, when Lord Anantadeva desires to destroy the entire creation, He becomes slightly angry. Then from between His two eyebrows appears three-eyed Rudra, carrying a trident. This Rudra, who is known as Sankarsana, is the embodiment of the eleven Rudras, or incarnations of Lord Siva. He appears in order to devastate the entire creation.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In each creation, the living entities are given a chance to close their business as conditioned souls. When they misuse this opportunity and do not go back home, back to Godhead, Lord Sankarsana becomes angry. The eleven Rudras, expansions of Lord Siva, come out of Lord Sankarsana’s eyebrows due to His angry mood, and all of them together devastate the entire creation.