דניאל ד:יב פירוש: רש״י

But leave its main roots in the ground but its main roots leave over.

and in fetters of iron and copper i.e., place his feet in iron fetters as is done to a horse that is left in the meadow; so shall you chain him with fetters.

in the grass Aram. בְדִתְאָא in the grass of the field, i.e., in the meadow, so that he should not move from there.