Bukhari :: Book 2 :: Volume 26 :: Hadith 641
Narrated Jabir bin 'Abdullah :
We came with Allah's Apostle (to Mecca) and we were saying: 'Labbaika Allahumma Labbaik' for Hajj. Allah's Apostle ordered us to perform 'Umra with that Ihram (instead of Hajj).
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