Salim narrates from his father (Sayyiduna Abdullah bin Umar, may Allah be pleased with them both) regarding a person who leads people in prayer while in a state of impurity (without ablution). Sayyiduna Abdullah bin Umar, may Allah be pleased with them both, says: That person should repeat the prayer, but the people will not repeat that prayer.
Hadith Referenceسنن الدارقطني / كتاب الصلاة / 1373
Hadith Takhrij«أخرجه البيهقي فى((سننه الكبير)) برقم: 4145، والدارقطني فى ((سننه)) برقم: 1373، وعبد الرزاق فى ((مصنفه)) برقم: 3650، وابن أبى شيبة فى ((مصنفه)) برقم: 4603»