with its leg tied; that is the sunnah of the Prophet ﷺ, who conformed to the Qur’anic etiquette of slaughter embodied in the verse, “Then, when their flanks have fallen” (i.e., when they have collapsed—something that can occur only after standing).

Points derived from the ḥadith
1 – The Prophet’s ﷺ practice is to pierce the camel while it is standing with one foreleg bound, for that perfects the slaughter and shows kindness to the animal. The noble verse just cited alludes to this, and al-Bukhārī records from Ibn ʿAbbās the wording: “ṣawāff, standing.” Sufyān ibn ʿUyaynah explained that ṣawāff—with the doubled consonant—is the plural of ṣāffah, meaning “lined up while standing.”
2 – It is disliked to slaughter a camel while it is sitting, because that prolongs the departure of its life.
3 – People today usually slaughter camels while they are sitting and hobbled. If they are unable to pierce them while standing and fear that they cannot perform the slaughter properly—thus stabbing the animal in a way that torments rather than relieves—it is better to let the camel sit, according to one’s ability and means.
4 – Allah’s mercy and tenderness toward His creation extend even to the moment their lives are taken.

With such compassionate rulings and profound tenderness, it becomes clear that this is a religion of kindness and mercy, not of savagery and oppression. Who will inform those who accuse it of the latter—while they themselves kill innocent human beings in their own homelands—so that they might grasp the truth?