The claim
Ibn Battuta covered record distances across three decades.
The evidence
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The chain of transmitters — passage/muwatta-1-044
A hadith with isnad — an example of a docum'en'ted text.
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chronicle — work/rihla-ibn-battuta
A passage of the Rihla describing the l'en'gth of Ibn Battuta's travels and his reach across the lands of Islam, faithfully abbreviated.
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object — work/rihla-ibn-battuta
The Rihla — his travel book titled the Gift of the Observers.
The historians' note
Sources estimate his distance at about a hundred thousand kilometres; the Rihla preserves thirty years of detail.