أَمْرًا مِّنْ عِندِنَاAs a command from Us.meaning, everything that happens and is decreed by Allah and the revelation that He sends down -- it all happens by His command, by His leave and with His knowledge.إِنَّا كُنَّا مُرْسِلِينَVerily, We are ever sending,means, to mankind, sending Messenger who will recite to them the clear signs of Allah.The need for this was urgent.رَحْمَةً مِّن رَّبِّكَ إِنَّهُ هُوَ السَّمِيعُ الْعَلِيمُ