And set firmly the mountains;
He established the mountains
And the mountains He set fir
And the mountains, He made them firm
And the mountains , He anchored it/fixed it firmly
And the mountains which are firmly established on earth
And solidified the mountains
And the mountains HE made them firm
And He is the One Who (putting together different elements) raised from the earth firmly fixed mountains
He set the mountains firmly
And the mountains He has fixed firmly