Nasai

“Hajjam” in that era referred to the person who performed cupping (hijama). Since the one who performs cupping has to suck out impure blood, the Prophet (sallallahu alayhi wa sallam) did not consider this profession appropriate for earning a livelihood; one should choose a good profession for earning. However, if someone performs cupping out of compassion, he should do it free of charge in order to attain reward. According to the majority of scholars, the wage of the hajjam is disliked (makruh tanzihi), not forbidden (haram), because the Messenger of Allah (sallallahu alayhi wa sallam) himself gave a wage to the one who performed cupping. If it were forbidden, he would not have given it. When deciding any issue, it is necessary to consider all related narrations; it is not correct to issue a ruling based on only one narration.

Hadith Commentary:
Benefits and Issues:
This hadith establishes that taking payment for cupping (hijama) and making it a profession is not a commendable act. In the next hadith, it is described as "khabeeth" (impure or vile), from which it is understood that a noble and dignified person should not adopt this profession. Some scholars, based on this hadith, have declared it to be haram (forbidden). However, a separate chapter regarding this matter is coming ahead, and from the ahadith in that chapter, it is established that taking payment for it is not haram. The majority of scholars, among whom are included the four Imams (a’immah arba‘a), are of the opinion of its permissibility based on these ahadith.

Explanation:
1:
In «كسب الحجام خبيث», the word "khabith" (impure) does not carry the meaning of being prohibited (haram), but rather means lowly and unbecoming. The Messenger of Allah (sallallahu alayhi wa sallam) instructed Muhayyisa (radi Allahu anhu) to benefit his camel and slave from the earnings of cupping (hijama), and he himself had cupping performed and paid the practitioner his wage. Therefore, the use of the word "khabith" regarding the earnings of the cupper is similar to how the Prophet (sallallahu alayhi wa sallam) called garlic and onion "khabith," even though their consumption is not prohibited. In the same way, the earnings of the barber (hajjam) are not haram; it is another matter that it is considered unbecoming. Here, "khabith" is in the sense of haram.

2:
Since fornication (zina) is among the obscene acts and major sins, the wage earned from it is also impure and haram. There is no difference whether the fornicating woman is a slave or free.

3:
Since the dog is an impure (najis) and filthy animal, the price obtained from it will also be impure. Its impurity is such that the Shariah has commanded that a vessel into which a dog puts its mouth must be washed seven times, one of which should be with earth. For this reason, buying and selling dogs and benefiting from them is prohibited, except in cases of dire necessity, such as for the protection of home, property, or livestock. Even then, taking a price is a lowly act; it should rather be given as a gift.

Benefits and Issues:
➊
In this chapter, it is narrated from the Prophet (sallallahu alayhi wa sallam)
that the earnings of the one who performs cupping (hijama) are impure (khabith).
Similarly, it is also narrated
that the Prophet (sallallahu alayhi wa sallam) after having cupping performed, ordered that a sa‘ (a measure) of dates be given to the one who performed it.
It is also mentioned that the grandfather of Ibn Muhaisah continuously asked about such earnings, so the Prophet (sallallahu alayhi wa sallam) permitted him to feed such earnings to a camel or a slave.
In cupping, one of the methods was
that the blood of the patient was sucked out by mouth.
Therefore, due to this aspect, it was called khabith, i.e., disliked.
Otherwise, it is not absolutely forbidden (haram).
If it were so, the Prophet (sallallahu alayhi wa sallam) would not have himself given it to the one who performed cupping,
nor would he have permitted feeding such earnings to a camel or a slave.
It is also possible
that the one who performed cupping used to sell the blood extracted from the body.
(Nayl al-Awtar: 5/321)
➋
Since the dog is a forbidden (haram) animal,
therefore its buying and selling is also forbidden (haram).
However, some people permit the purchase of a hunting dog (kalb mu‘allam).

➌
What doubt can there be about the prohibition of income obtained from adultery (zina)?