SB 8.12.41
sri-suka uvaca
evam bhagavata rajan
srivatsankena sat-krtah
amantrya tam parikramya
saganah svalayam yayau
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Sukadeva Gosvami said: O King, having thus been praised by the Supreme Personality, who bears the mark of Srivatsa on His chest, Lord Siva circumambulated Him. Then, after taking permission from Him, Lord Siva returned to his abode, Kailasa, along with his associates.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Srila Visvanatha Cakravarti Thakura remarks that when Lord Siva was offering obeisances unto Lord Visnu, Lord Visnu arose and embraced him. Therefore the word srivatsankena is used here. The mark of Srivatsa adorns the chest of Lord Visnu, and therefore when Lord Visnu embraced Lord Siva while being circumambulated, the Srivatsa mark touched Lord Siva’s bosom.