﴿فَنِعْمَ الْمَاهِدُونَ﴾
How excellent We are at spreading it out. (Al-Dhāriyāt 51:48)
The preceding words are:
﴿وَالْأَرْضَ فَرَشْنَاهَا﴾
We spread out the earth.
This statement identifies the one praised. A rhetorical grammatical reconstruction may specify the unspoken naḥnu, “We,” as the referent of the praise construction.
The antecedent statement already makes the praised agent apparent, so explicit repetition is unnecessary.