Sayyiduna Abu Hurairah (may Allah be pleased with him) narrated that the Messenger of Allah (peace and blessings be upon him) said: "Whoever catches one rak'ah of a prayer has caught the (congregational) prayer."
Hadith Referenceسنن دارمي / من كتاب الصللاة / 1254
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده ضعيف غير أن الحديث متفق عليه، [مكتبه الشامله نمبر: 1256]
Hadith Takhrijاس روایت کی سند ضعیف لیکن حدیث صحیح متفق علیہ ہے۔ دیکھئے: [بخاري 580] ، [مسلم 607] ، [أبويعلي 5962] ، [ابن حبان 1483] ، [الحميدي 976]
It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: “Whoever catches one rak‘ah of the Fajr prayer before the sun rises, he has attained the (reward of) Fajr prayer (in congregation), and whoever catches one rak‘ah of the ‘Asr prayer before the sun sets, he has attained the (reward of) ‘Asr prayer (in congregation).”
Hadith Referenceسنن دارمي / من كتاب الصللاة / 1256