This was a retort to the aggression of the Polytheists...

This was a retort to the aggression of the Polytheists against the Prophet (S) and his companions, which had gone on for ten years. They had killed some of them, banished some to Abyssinia and some to Madinah, and tortured another group of them and destroyed the honour of others as in the account of Sumayyaha the mother of 'Ammar. They confiscated their houses and their wealth in Makkah.…