إِلَى فِرْعَوْنَ وَمَلَيِهِ
And indeed We sent Musa with Our Ayat and a manifest authority. To Fir`awn and his chiefs,
In these verses Allah informs of His sending Musa with His signs and clear proofs to Fir`awn, the king of the Coptic people, and his chiefs.
فَاتَّبَعُواْ أَمْرَ فِرْعَوْنَ
but they followed the command of Fir`awn.
This means that they followed his path, way and methodology in transgression.
وَمَا أَمْرُ فِرْعَوْنَ بِرَشِيدٍ
and the command of Fir`awn was no right guide.
This means there was no right guidance in it. It was only ignorance, misguidance, disbelief and stubbornness.
Just as they followed him in this life and he was their leader and chief, likewise he will lead them to the Hellfire on the Day of Resurrection. He will lead them directly to it and they will drink from springs of destruction. Fir`awn will have a great share in that awful punishment.
This is as Allah, the Exalted, said,
فَعَصَى فِرْعَوْنُ الرَّسُولَ فَأَخَذْنَـهُ أَخْذاً وَبِيلً
But Fir`awn disobeyed the Messenger; so We seized him with a severe punishment. (73;16)
Allah also said,
فَكَذَّبَ وَعَصَى
ثُمَّ أَدْبَرَ يَسْعَى
فَحَشَرَ فَنَادَى
فَقَالَ أَنَاْ رَبُّكُمُ الاٌّعْلَى
فَأَخَذَهُ اللَّهُ نَكَالَ الاٌّخِرَةِ وَالاٍّوْلَى
إِنَّ فِى ذَلِكَ لَعِبْرَةً لِّمَن يَخْشَى
But Fir`awn belied and disobeyed. Then he turned his back, striving (against Allah). Then he gathered (his people) and cried aloud, Saying;"I am your lord, most high."
So Allah, seized him with exemplary punishment for his last and first transgression. Verily, in this is an instructive admonition for whosoever fears Allah. (79;21-26)
Allah also said,
يَقْدُمُ قَوْمَهُ يَوْمَ الْقِيَامَةِ فَأَوْرَدَهُمُ النَّارَ
وَبِيْسَ الْوِرْدُ الْمَوْرُودُ