Asking dua with imam is allowed or not. Is there any hadith?
بسم الله الرحمن الرحيم
(Fatwa: 362/284/B=01/1435)
The acceptance of dua after fardh salah and at the time of tahajjud is proved from sahih hadith. So we should supplicate after fardh salah whether we are behind imam or alone. In each case we will follow the hadith.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband