Abdullah bin Abi Qatadah narrates from his father, Sayyiduna Abu Qatadah (may Allah be pleased with him), who said: Once we were praying with the Messenger of Allah (peace and blessings be upon him) when he heard a commotion of people. When he (peace and blessings be upon him) had finished the prayer, he called them and asked: "What is the matter with you?" They said: We hurried to the prayer. He (peace and blessings be upon him) said: "Do not do so; rather, when you come to the prayer, let calm and tranquillity be upon you; whatever of the prayer (with the congregation) you catch, pray it, and whatever you have missed, complete it."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3630