ভূমিকা
They describe the blessings the Quraish tribe were given to enjoy; might they be thankful to Him and worship Him, the Lord of the Sacred House (Ka'ba) from which they obtained all their honour and high social status.
As was said at the beginning of Surah Duha, which is considered one Surah with Surah Inshirah, the same as Surah Fil is with Surah Quraish, the unity and similarity of the matters, in both of them (Fil and Quraish), are so much so that they can be taken as an evidence for the unity of Surah Duha and Surah Inshirah. That is why both of them must be recited together, one set or the other in one 'rak'at' of a prayer, as a complete Surah if one chooses them in his obligatory prayers.
For more explanation on this subject, books of jurisprudence (chapters on prayers and recitation) are at your disposal. The Virtue of Studying Surah Quraish On the virtue of reciting the Surah, a tradition is adequate to cite from the holy Prophet (S) who has been narrated to have said: "He who recites it is rewarded ten 'good deeds' as many as the number of those who perform the ritual circumambulation of the Ka'ba, and spiritual retreat in the Sacred Mosque".
“For stabilizing and unifying the Quraish," 2. “(We maintain for them) their trading caravans by winter and summer," 3. “So let them worship the Lord of this House (Ka'ba)," 4.