A person may declare cherem part of his flock or his cattle, some of his male and female Canaanite slaves, or part of his ancestral land; but if he declared all of them to be cherem, they do not become cherem; [these are] the words of R’ Elazar. R’ Elazar ben Azaryah said: If one may not declare all his property cherem to the Most High, how much more so must a person spare his property!