I totoaly agree with Kaboter Jaan and Ajmali .Allah (swt) knows what is best for us. may be the wishes we ask for ( knowing that it is for our good)but with Allah (swt) might not be for our best and so for this reason he does not grant that wish , no matter how much we try to ask for it .
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***If I had a flower for each time I thought of My Mother, I could walk in my garden forever***