To see a grave digger or excavator in the dream means death for the one who sees it provided any of the following happens; he pushes the grave digger away from his place; his animal tramples the grave digger, the grave digger falls on the ground; he himself is in the state of sakraat. But if any of the following happens then he will either lose his job or die; he rolls up his bedding; his turban or topi falls off from his head; his hand gets cut off from his body; his tongue is cut off; he becomes blind.
And Allah knows best.
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