When the words of Iqama are pronounced, do not come to (prayer) running, but go with tranquillity, and pray what you are in time for, and complete (what you have missed) for when one of you is preparing for prayer he is in fact engaged in prayer. (Using translation from Muslim 602b)
"إذَا ثُوِّبَ للصَّلاةِ فلا تَأتُوها وَأنْتُمْ تَسْعَوْنَ، وَأتُوها وَعَليكم السكينة، فما أدركْتُمْ فصَلُّوا، وما فاتكُم فأتُّموا، فإنَّ أحَدكمُ إذَا كانَ يعمدُ إلى الصَّلاة فهو في صلاةٍ".