Brahmanya-devaya

“My dear father, O great sage, I know that your feet are very soft, like a lotus flower, and that My chest is as hard as a thunderbolt. I am therefore afraid that you may have felt some pain by touching My chest with your feet. Let Me therefore touch your feet to relieve the pain you have suffered.” (Lord Vishnu speaking to Bhrigu Muni, Krishna, The Supreme Personality of Godhead, Vol 2, Ch 34)