Khaythamah (may Allah have mercy on him) said: A man recited Surah al-Fath before Abdullah bin Mas'ud (may Allah be pleased with him). When he reached this passage: "Like a crop that puts forth its shoot, then strengthens it, so it grows thick and stands upon its stalk, delighting the sowers, so that He may enrage the disbelievers through them" [Surah al-Fath: 29], he said: "So that He may enrage the disbelievers through them" means that Allah enrages the disbelievers through the Prophet and his Companions. Then Abdullah (may Allah be pleased with him) said: "You are the crop whose harvest time has drawn near."
Imam al-Shafi'i (may Allah have mercy on him) said concerning this statement of Allah Almighty: "You are the best nation brought forth for mankind" [Surah Al Imran: 110]: Allah Almighty has given this ummah its virtue because it is the ummah of the Prophet (peace and blessings be upon him), as opposed to the nations of the earlier prophets.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 17716