Keilim 9:5-6
Keilim 9:5
Let’s say that shards of an earthenware vessel that was used to hold a ritually unclean liquid fell into an oven’s airspace. If the oven was heated, it is impure because some of the impure liquid will be exuded from the shards. The same is true when it comes to recently-pressed olive remains that are used as fuel but if the olive remains are 12 months old, the oven remains pure (because any oil residue has certainly dried up). If it is known that liquid will be exuded from the olive remains, then impurity will be conveyed even after three years.
Keilim 9:6
Let’s discuss the remains of olives and grapes that were pressed in ritual purity, ritually unclean people later happened to walk on them (not intending to tread them) and liquid was subsequently exuded. These are ritually clean because they were initially pressed in a state of purity. Let’s say that a hook was pushed into a wooden spindle, a spike was pushed into stick used to guide cattle, or a ring was baked into a brick, and the metal object that is now in the interior was ritually clean. If they’re brought into a tent with a corpse, or if a zav moves them, they are rendered unclean; if they subsequently fall into an oven’s airspace, they convey ritual impurity to it. If a loaf of trumah touches them, however, it remains ritually clean.