Umar ibn al-Khattab, the second rightly guided caliph, unified the community in night prayer of Ramadan (tarawih) behind one imam, calling this gathering ni'mat al-bid'a — an excellent innovation — meaning a good new way in worship without contradicting revelation.
Classical scholars use this hadith to show that not every novelty is blameworthy; classification depends on evidence.
The concept of bid'a
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How the tradition reads hadith on bid'a.