Hadith
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ الْعَلاَءِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ يَعْقُوبَ، عَنْ أَبِيهِ، وَإِسْحَاقَ بْنِ عَبْدِ اللَّهِ، أَنَّهُمَا أَخْبَرَاهُ أَنَّهُمَا، سَمِعَا أَبَا هُرَيْرَةَ، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِذَا ثُوِّبَ بِالصَّلاَةِ فَلاَ تَأْتُوهَا وَأَنْتُمْ تَسْعَوْنَ وَأْتُوهَا وَعَلَيْكُمُ السَّكِينَةُ فَمَا أَدْرَكْتُمْ فَصَلُّوا وَمَا فَاتَكُمْ فَأَتِمُّوا فَإِنَّ أَحَدَكُمْ فِي صَلاَةٍ مَا كَانَ يَعْمِدُ إِلَى الصَّلاَةِ " .
Yahya related to me from Malik from al-Ala ibn Abd ar-Rahman ibn Yaqub from his father and Ishaq ibn Abdullah that they informed him that they heard Abu Hurayra say, "The Messenger of Allah, may Allah bless him and grant him peace, said, 'When the iqama is called for prayer, do not come to it running, but come with calmness. Pray what you catch and complete what you miss. You are in prayer as long as your aim is the prayer
Sahih · Salim al-Hilali
Muwatta Malik 149 ·Book 3, Hadith 4·Also available on sunnah.com·