It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When you come to the prayer, do not come running; come walking with calm and tranquillity. Pray whatever you catch, and complete whatever you have missed."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3192