Q 40:21

Have they not traveled in the land and seen what was the end of those who were before them? They were superior to them in strength, and in the traces in the land. But Allah seized them with punishment for their sins. And none had they to protect them from Allah (21)That was because there came to them their Messengers with clear evidences but they disbelieved (in them). So Allah seized them. Verily, He is All-Strong, Severe in punishment (22) The Severe Punishment for the Disbelievers أَوَلَمْ يَسِيرُوا (Have they not traveled), 'these people who disbelieve in your Message, O Muhammad,' فِي الْأَرْضِ فَيَنْظُرُوا كَيْفَ كَانَ عَاقِبَةُ الَّذِينَ كَانُوا مِنْ قَبْلِهِمْ (in the land and seen what was the end of those who were before them?) means, the nations of the past who disbelieved in their Prophets (peace be upon them), for which the punishment came upon them even though they were stronger than Quraysh. وَآثَارًا فِي الْأَرْضِ (and in the traces in the land.) means, they left behind traces in the earth, such as structures, buildings and dwellings which these people [i.e., the Quraysh] cannot match. This is like the Ayat: وَلَقَدْ مَكَّنَّاهُمْ فِيمَا إِنْ مَكَّنَّاكُمْ فِيهِ (And indeed We had firmly established them with that wherewith We have not established you!)(46:26) وَأَثَارُوا الْأَرْضَ وَعَمَرُوهَا أَكْثَرَ مِمَّا عَمَرُوهَا (and they tilled the earth and populated it in greater numbers than these have done)(30:9). Yet despite this great strength, Allah punished them for their sin, which was their disbelief in their Messengers. وَمَا كَانَ لَهُمْ مِنَ اللَّهِ مِنْ وَاقٍ (And none had they to protect them from Allah.) means, they had no one who could protect them or ward off the punishment from them. Then Allah mentions the reason why He punished them, and the sins which they committed. Allah says: ذَٰلِكَ بِأَنَّهُمْ كَانَتْ تَأْتِيهِمْ رُسُلُهُمْ بِالْبَيِّنَاتِ (That was because there came to them their Messengers with clear evidences) meaning with clear proof and definitive evidence. فَكَفَرُوا (but they disbelieved.) means, despite all these signs, they disbelieved and rejected the Message. فَأَخَذَهُمُ اللَّهُ (So Allah seized them.) means, He destroyed them utterly, and a similar fate awaits the disbelievers. إِنَّهُ قَوِيٌّ شَدِيدُ الْعِقَابِ (Verily, He is All-Strong, Severe in punishment) means, He is possessed of great strength and might. شَدِيدُ الْعِقَابِ (Severe in punishment,) means, His punishment is severe and agonizing; we seek refuge with Allah, may He be blessed and exalted, from that.