When the Prophet lost his last son, an opponent who hated him taunted him with being ‘cut off’ without posterity. This Meccan sura comes to reassure the Prophet and as a retort to his enemy.
In the name of God, the Lord of Mercy, the Giver of Mercy
1We have truly given abundancea to you [Prophet]— 2so pray to your Lord and make your sacrifice to Him alone— 3it is the one who hates you who has been cut off.