Meat slaughtered by one who is junub or menstruating
Question

                A man slaughtered some meat for himself when he was junub. Is there any sin on him?.
Praise be to Allah.
    Meat slaughtered by one who is junub or menstruating is 
    halaal, and there is no sin on him for that. 

    Ibn Qudaamah (may Allaah have mercy on him) said: If he is 
    junub, it is permissible for him to say Bismillaah and slaughter (meat). 

    That is because the one who is junub is allowed to say 
    Bismillaah (in the name of Allaah) and there is no reason why he should not 
    do that. It is only forbidden for him to read Qur’aan, unless he recites 
    from memory. Hence it is prescribed for him to say Bismillaah when he starts 
    to do ghusl. Janaabah is no worse than kufr, and kaafirs may say the name of 
    God and slaughter meat. 

    Among those who state that meat slaughtered by one who is 
    junub is allowed are: al-Hasan, al-Hakam, al-Layth, al-Shaafa’i, Ishaaq, Abu 
    Thawr and ashaab al-ra’y. Ibn al-Mundhir said: I do not know of anyone who 
    did not allow that. And it is permissible for a menstruating women to 
    slaughter meat, because she comes under the same rulings as one who is 
    junub. End quote from al-Mughni, 11/61 

    Al-Nawawi (may Allaah have mercy on him) said in 
    al-Majmoo’ (9/74): Ibn al-Mundhir narrated that there was scholarly 
    consensus that meat slaughtered by one who is junub is permissible. He said: 
    As the Qur'aan indicates that meat slaughtered by people of the Book is 
    halaal even though they are naajis, then it is more appropriate that meat 
    slaughtered by one who the Sunnah has stated is not naajis should be 
    permissible. And he said: A menstruating woman is like one who is junub. End 
    quote.  

    The fuquaha’ quoted as evidence for that the report narrated 
    by al-Bukhaari (5501) from Ka’b ibn Maalik, according to which a slave woman 
    of theirs was tending sheep in Sal’, and she saw that one of her sheep was 
    dying, so she broke a stone and slaughtered it, but he told his people: “Do 
    not eat it until I go to the Prophet  (peace and blessings of Allaah be 
    upon him) and ask him, or until I send someone to him to ask him. He went to 
    the Prophet  (peace and blessings of Allaah be upon him), or sent 
    someone to him, and the Prophet  (peace and blessings of Allaah be upon 
    him) told them to eat it. 

    Sal’ is a well-known mountain in Madeenah. 

    It says in Sharh al-Muntaha (3/417) This shows that it 
    is permissible to eat meat slaughtered by a woman, a slave woman, a 
    menstruating woman and one who is junub, because the Prophet  (peace and 
    blessings of Allaah be upon him) did not ask for any details about the 
    woman. End quote. 

    And Allaah knows best.