A Reminder of Those Who were destroyed among the Previous Nations

Allah tells us about those past nations and the punishment and vengeance that struck them for their going against the Messengers and disbelieving in the Prophets, peace be upon them. We have already seen their stories in detail in numerous places (in the Qur'an). Allah says:

أُوْلَـئِكَ الاٌّحْزَابُ

أُولَـٰئِكَ الْأَحْزَابُ (They were the [ strong ] groups. - 38:13) One explanation of this statement is that it is the description of the word 'groups' in verse 11. In other words, 'these are the groups or Confederates that have been pointed out in this verse.' Maulana Thanavi (رح) has gone by this Tafsir in his explanation of the verse. But, other commentators explain it in the sense that actually they were the groups that were really strong, not these people of Makkah. In other words, those who possessed real strength and power were the people of Nuh and ` Ad and Thamud and others like them. Compared with them, the Mushrihs of Makkah were nothing. When such powerful people could not escape Divine punishment, they would hardly count. (Qurtubi)