Bulugh al-Maram #321
The Book of Prayer
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَلِأَبِي دَاوُدَ : { ثُمَّ اِقْرَأْ بِأُمِّ اَلْقُرْآنِ وَبِمَا شَاءَ اَللَّهُ } 11 - صحيح . رواه أبو داود (8529) .
And Abu Dawud has "Then read the Ummul-Qur'an (i.e. Surah al-Fatiha) and what ever Allah wishes".
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About Bulugh al-Maram
This hadith is #321 from Bulugh al-Maram, in the Book of The Book of Prayer.