The sequence of narrators through whom a Hadith was received is its sanad (سند).
When no narrator is omitted, the sanad is muttaṣil (متصل), connected.
This is the third condition of ṣaḥīḥ li-dhātihi. Trustworthiness and careful preservation do not replace the requirement for a connected sanad.
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Ṣaḥīḥ li-Dhātihi: The Remaining Three Conditions
The sequence of narrators through whom a Hadith was received is its sanad (سند).
When no narrator is omitted, the sanad is muttaṣil (متصل), connected.
This is the third condition of ṣaḥīḥ li-dhātihi. Trustworthiness and careful preservation do not replace the requirement for a connected sanad.