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What if someone says, "You have established that 11 rak'ahs (is the Sunnah), so then what do you say if we pray behind an imaam who prays 23 or more, should we remain seated and not pray with him when he stands for the sixth tasleem (after 10 rak'ahs), or is it better to finish with him?" The answer: It is best to complete (the prayer) with him, and the evidence for this is from two angles: The first one is the statement of the Prophet (sallallaahu 'alayhe wa sallam) about the night prayers of Ramadhaan: "Verily whoever stands (in prayer) with the imaam until he leaves, then it will be written for him that he stood a (complete) night (in prayer)." [5] So whoever remained seated and waited for the imaam to reach the Witr Prayer, then he has not prayed with the imaam until he has left, since he has left off a portion of his prayer. The second angle of proof is...