swear by Allah only, and swear by Allah only when you are speaking the truth

swear by Allah only, and swear by Allah only when you are speaking the truth​

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The one who knows Allah the Almighty by His beautiful names and attributes must love him more than he loves for father and his mother. Rather, he would love his Lord more than he loves himself. Accordingly, if he is to swear then he may swear only by the Almighty.