Krishna Knew that Dhritarashtra could well be pissed versus Bhima as he experienced killed his 100 sons. Hence, when Dhritarashtra requested to embrace Bhima, an iron statue was handed over to him. Fearful and repentant, the boys questioned Krishna how to proceed, but Krishna acknowledged the curse and reported it https://www.youtube.com/shorts/lMzgQ7m0MTE