ויקרא, פרק ט״ו, פסוק י׳

Ritual impurity operates through a precise hierarchy, distinguishing between different physical interactions with a person experiencing a bodily discharge. A clear line is drawn between direct touch and the act of carrying. When an individual touches whatever the afflicted person rests upon, the primary approach among commentators is that this refers specifically to a riding saddle or seat [רש״י, רד״צ הופמן, שטיינזלץ]. This cannot refer to objects located underneath the saddle itself due to a basic logical principle: if the afflicted person only transfers impurity to objects through direct contact, the saddle cannot possess a stricter power to contaminate objects beneath it without physical touch [מזרחי, גור אריה]. Consequently, merely touching the saddle results in a relatively light state of impurity that lasts until evening but does not require the washing of garments. This establishes that the laws governing a saddle are more lenient than those governing a bed, as touching the bed does require washing one's clothes [רש״י, רש״ר הירש].

Alongside this straightforward understanding, a Talmudic tradition shifts the spatial focus to objects located above the afflicted person. In this view, objects suspended or carried over the individual contract impurity even without direct physical contact [בכור שור, תורה תמימה]. This perspective is supported by a tradition that shifts the focus of the action from the one carrying to the object being carried above [מנחת שי, הכתב והקבלה]. These suspended objects contract a very light form of impurity, compared conceptually to a drifting leaf or a wafting scent. As a result, they can only transfer impurity to food and drink, but not to people or other vessels [תורה תמימה, רש״ר הירש, רד״צ הופמן]. Commentators disagree on the exact origin of this specific law. Some maintain that it is a direct Torah law [הראב״ד, מובא בתורה תמימה ורש״ר הירש]. Conversely, others argue that the plain meaning of the law only addresses what is literally underneath the person. Therefore, the impurity of objects above him is merely a Rabbinic decree, with the original text serving only as a conceptual hint rather than a direct source [הרמב״ם, הכתב והקבלה, מזרחי].

The rules become significantly stricter when it comes to the act of carrying. While simply touching a saddle causes a light impurity, carrying it triggers a much heavier status. This strict rule applies to all sources of impurity associated with the afflicted person, including his discharge, saliva, semen, urine, bed, and saddle. Carrying any of these items, even without direct physical contact, makes a person deeply impure, requiring them to bathe in water and wash their clothes [רש״י, ביאור יש״ר, רש״ר הירש, שטיינזלץ]. However, there is a practical limit to this rule, which excludes massive, heavy stones. Because people do not typically carry such massive objects in their daily lives, the specific laws of carrying do not apply to them [תורה תמימה].