It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him and his family, ordered the killing of two black-colored creatures. Yahya bin Hamzah says that by black-colored creatures are meant the snake and the scorpion.
Hadith Takhrij«أخرجه ابوداود: 921، والترمذي: 390، والنسائي: 3/10، وابن ماجه: 1245، (انظر مسند أحمد ترقيم الرسالة: 7469 ترقیم بيت الأفكار الدولية: 7463»
Brief Explanation
Benefits: ... The black snake is called "aswad," and every type of snake is also called "aswad." Here, what is meant is the snake in general. Referring to both the snake and the scorpion as "aswadayn" is an example of "bab al-taghlib" (the rule of predominance in Arabic grammar).