Overall meaning : The Almighty explains that among the desert Arabs there are also those who believe in Allah and the Day of Judgement and take what they spend on good causes as a means of drawing closer to Allah—whereby the anticipate divine reward—and their being remembered in the Messenger’s prayers. Indeed, the Messenger’s prayers are a great means for them to draw closer to their Lord. Their Lord will surely admit them into His mercy. He is All-Forgiving, All-Merciful.
Allah Almighty then asserts that He is well-pleased with the Companions of Allah’s Messenger, may Allah bless him and grant him peace, who were the first and foremost to embrace Islam among the Emigrants and the Helpers, and those who came after them and followed in their footsteps with respect to faith and righteous deed, stating that he is well-pleased with them and they are also well-pleased with Him. He has made ready for them gardens under whose trees and mansions rivers flow, to dwell in them forever. That is the ultimate success.