Their saying: “The left hand does not harm you” and the response, “Your left hand is like your right”
Question

                In Saudi, if someone gives you something with his left hand for some reason, he says: “The left hand does not harm you,” and the response is to say, “Your left hand is like your right,” but we do not mean to liken a person to Allah, may He be glorified and exalted, by saying that both of his hands are right hands. Rather the meaning is that it does no harm to take from the one who says that, whether he gives with his left hand or his right. Is this phrase acceptable?.
Praise be to Allah.
    There is a prohibition on giving and taking with the left 
    hand in the report narrated by Ibn Maajah (3266) from Abu Hurayrah (may 
    Allah be pleased with him), according to which the Prophet (blessings and 
    peace of Allah be upon him) said: “Let one of you eat with his right hand 
    and drink with his right hand, and take with his right hand and give with 
    his right hand, for the Shaytaan eats with his left hand, drinks with his 
    left hand, gives with his left hand and takes with his left hand.”

    Classed as saheeh by al-Albaani in Saheeh Ibn Maajah. 

    And Muslim (2020) narrated from Ibn ‘Umar (may Allah be 
    pleased with him) that the Messenger of Allah (blessings and peace of Allah 
    be upon him) said: “No one among you should eat with his left hand or drink 
    with it, for the shaytaan eats with his left hand and drinks with it.” And 
    Naafi’ used to add: “and he should not take with it or give with it.” 

    Al-Shawkaani (may Allah have mercy on him) said in Nayl 
    al-Awtaar (8/183): His words “No one among you should eat with his left 
    hand” signify that it is not allowed to eat or drink with the left hand, and 
    this prohibition has the sense of being haraam, as is established in usool; 
    it should not be interpreted as meaning that it is no more than makrooh 
    unless there is some indication to that effect in the context. Al-Nawawi 
    said: This applies if there is no excuse. If there is an excuse which means 
    that a person is unable to eat or drink with his right hand, because of 
    sickness or injury and so on, then it is not disliked to use the left hand. 
    End quote. 

    Based on that, if a person offers something with his left 
    hand for a reason, there is nothing wrong with it, and if he says in that 
    case, “my left hand does not hate you,” perhaps it would be more correct for 
    him to say “my right hand does not hate you”, because he has an excuse for 
    not giving it to you with the right hand, and it does not have anything 
    against you. Or perhaps the meaning is that the left hand also loves you and 
    would like to serve you. 

    When the one who takes says “Your left hand is like your 
    right,” he means that it does not matter with which hand you give. If there 
    is an excuse there is nothing wrong with saying that, but if there is no 
    excuse, it is wrong to say that because it is contrary to sharee’ah. The 
    left hand is not like the right hand; rather it is forbidden to give with 
    the left hand as stated above. 

    Shaykh Ibn ‘Uthaymeen (may Allah have mercy on him) was 
    asked: What is the ruling on a man saying to his brother, “Your left hand is 
    like your right,” if he cannot give him something with his right hand, so he 
    gives it to him with his left hand and he says to him, “The left hand does 
    not hate you”? We know that there is no one whose left hand is like his 
    right except Allah, may He be glorified and exalted. 

    He replied: Whatever the case, this depends on the intention 
    of the one who says it. If he says: “ Your left hand is like your right,” 
    meaning that it is used instead of the right hand when he is not able to use 
    it, in that case there is nothing wrong with it and I do not think that 
    anyone intends to liken any created being to the Creator in this regard. As 
    for the saying “The left hand does not hate you,” I do not know what it 
    means. 

    Questioner: O Shaykh, this is well known. For example, a 
    person gives something to another person with his left hand, and so that the 
    other person will not be offended, he says, “The left hand does not hate 
    you,” and the one who takes it says: “Your left hand is like your right.” 

    Shaykh: We have never heard this before. It is not something 
    that we use in our community here. But I do not think that the man intends 
    to liken any person to Allah, may He be glorified and exalted. 

    End quote from al-Fataawa al-Thalaathah. 

    And Allaah knows best.