Is it permissible for one who travels after Maghrib to combine the Maghrib and 'Isha' prayers?
Machine translationRead the Arabic original
Question : The questioner says: If I travel after the adhan of Maghrib, do I combine the Maghrib and 'Isha' prayers by combining and shortening, or do I not do so?
Answer : If you are in your own country and have not left, and you intend to travel immediately after the Maghrib prayer, you do not combine; because you have no valid reason for combining at that time, since you have not left your country. However, if you are in a country you have traveled to, such as if you came to Makkah for 'Umrah, and then you intend to travel between Maghrib and 'Isha', there is no harm if the imam prays Maghrib for you to pray 'Isha' behind him shortened, and then you leave for your country.
Answer : If you are in your own country and have not left, and you intend to travel immediately after the Maghrib prayer, you do not combine; because you have no valid reason for combining at that time, since you have not left your country. However, if you are in a country you have traveled to, such as if you came to Makkah for 'Umrah, and then you intend to travel between Maghrib and 'Isha', there is no harm if the imam prays Maghrib for you to pray 'Isha' behind him shortened, and then you leave for your country.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، لقاء[19 من51]هل لجوز لمن يسافر بعد المغرب جمع المغرب والعشاء؟!! الشيخ ابن عثيمين- مشروع كبار العلماء — youtube.com
The Arabic text is a machine transcription of the audio recording.
