The Permissibility of a Traveler Praying Behind a Resident and Vice Versa
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Q: What is the ruling on a resident praying behind a traveler, or the reverse? And does the traveler have the right to shorten the prayer in that case, whether he is the imam or the follower?
A: A traveler praying behind a resident, and a resident praying behind a traveler, both are permissible without blame. However, if the follower is the traveler and the imam is the resident, it is obligatory for him to complete the prayer following his imam. This is based on what is established in the Musnad of Imam Ahmad and Sahih Muslim from Ibn Abbas (may Allah be pleased with him), who was asked about a traveler praying four rak'ahs behind a resident, and he answered that this is the Sunnah.
As for a resident praying behind a traveler in a four-rak'ah prayer, he completes his prayer when his imam concludes the prayer.
A: A traveler praying behind a resident, and a resident praying behind a traveler, both are permissible without blame. However, if the follower is the traveler and the imam is the resident, it is obligatory for him to complete the prayer following his imam. This is based on what is established in the Musnad of Imam Ahmad and Sahih Muslim from Ibn Abbas (may Allah be pleased with him), who was asked about a traveler praying four rak'ahs behind a resident, and he answered that this is the Sunnah.
As for a resident praying behind a traveler in a four-rak'ah prayer, he completes his prayer when his imam concludes the prayer.
Source
binbaz.org.sa
The Arabic text is copied verbatim from the original source, without any edits.