Kalima- i Shahadah on Mizan

Kalima Shahadah will weigh heavier than seven levels of heavens and the earth on Mizan
“I recommend you to recite “لاَ اِلهَ اِلاَّ اللّهُ ”; because if this world is put on one side of the scale and the heavens and the earth on the other, the scale of “لاَ اِلهَ اِلاَّ اللّهُ ” will weigh heavier. If the heavens and the earth surround this world, it breaks through them and reaches the presence of Allah (swt).” (Hayat-us Sahabe)