بسم الله الرحمن الرحيم
In the Name of Allah The most Gracious The Most Merciful
Al-Nawawi said in al-Majmoo’ (3/526): The time for Taraweeh begins when ‘Isha’ prayer is over, as was stated by al-Baghawi and others, and lasts until dawn comes.
Shaykh Ibn ‘Uthaymeen (may Allaah have mercy on him) said: There is nothing wrong with praying ‘Isha’ behind one who is praying Taraweeh. Imam Ahmad (may Allaah have mercy on him) stated that if a man enters the mosque in Ramadaan when they are praying Taraweeh, he should pray behind the imam with the intention of praying ‘Isha’, then when the imam says the salaam at the end of the prayer, he should complete whatever remains of ‘Isha’ prayer. Majmoo’ Fataawa Ibn ‘Uthaymeen, 12/443, 445
Shaykh Ibn ‘Uthaymeen said: The time for Taraweeh is from after ‘Isha’ prayer until dawn comes. Majmoo’ Fataawa Ibn ‘Uthaymeen, 14/210
Question: It is now winter and the Imams combine the Maghrib (Sunset) Prayer and the `Isha’ (Evening) Prayer when there is a legal excuse for combining them. Soon the month of Ramadan will come; is it permissible for us to perform the Tarawih Prayers (special supererogatory night Prayer in Ramadan) immediately after the `Isha’ Prayer when it is combined with the Maghrib Prayer at the due time of the Maghrib Prayer?
Answer: There is no sin in offering the Tarawih Prayer after combining the `Isha’ and Maghrib Prayers when there is a legal excuse that permits combining them. The Permanent Committee for Scholarly Research and Ifta’