Sayyiduna Abu Qatadah (may Allah be pleased with him) narrates: Once we were praying behind the Prophet (peace and blessings be upon him) when he heard the sound of people (hurrying) behind him. When he finished his prayer, he asked: What is the matter with you? They said: We were hurrying to the prayer. The Prophet (peace and blessings be upon him) said: Do not do that. Let each of you pray whatever of the prayer he catches, and complete afterwards whatever has already passed.
Tabarani recorded it in al-Mu'jam al-Awsat, and its narrators are the narrators of the Sahih. It is agreed upon (by Bukhari and Muslim) with the wording: "and whatever has already passed, complete it."
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2091
Hadith Gradingمحدثین:إسنادہ صحیح ورجالہ رجال الصحیح۔
Hadith Takhrij«أخرجه صحيح البخاري برقم: 609، وأخرجه مسند أحمد برقم: 22102، وأخرجه سنن الدارمي برقم: 1283، وأخرجه صحيح ابن خزيمة برقم: 1772، وأخرجه المعجم الأوسط للطبراني برقم: 456»