A Summary of the Srimad Bhagavata Mahapuranam-4.2.

4.The Stories of Siva and Sati, and Rishabhadeva and Bharata-2.

Brahma was in a state of discomfiture at the total disregard that they paid to his request.

He was annoyed, and anger burst through his forehead.

But as these Kumaras were equally powerful due to their centralisation in God Almighty, this anger could not be directed towards them; and since Brahma could not swallow the anger, he released it.

At that moment, a fiercely roaring being arose from his forehead, demanding an immediate abode for itself. It cried out.

Then Brahma said, “Oh, Rudra!” Because it cried the moment it was born, it is designated as Rudra—one who makes roaring sounds, and yells and shouts.

Brahma said, “Help me in creation.”

Immediately this being created an endless variety of demoniacal creatures which were frightening even to Brahma’s eye.

Brahma said, “Please stop your creation!”

“Then what shall I do?” asked Rudra.

“I shall give you an abode. Go there, and keep quiet. Don’t do anything at all,” replied Brahma.

Then Brahma named him Siva, Rudra, Bhava, and many other names, and also gave him the Shaktis; and Rudra, who is Siva, retired to Kailasa.

He did not interfere with anybody.

Swami Krishnananda
To be continued ....