كتاب الإمامة
Read the English translation first, with the original Arabic directly underneath.
It was narrated that Abu Aliyah Al-Barra said:
"Ziyad delayed the prayer, then Ibn Samit came to me and I gave him a chair and he sat on it. I told him what Ziyad had done and he bit his lip (in disapproval), and he struck me on the thigh and said: 'I asked Abu Dharr the same question you asked me, and he struck me on the thigh as I struck you on the thigh and said: I asked the Messenger of Allah (ﷺ) the same question as you have asked me and he struck me on the thigh as I have struck you on the thigh and said: Offer the prayer on time, and if you catch up with them, then pray with them, and do not say: 'I have already prayed so I will not pray(now)."'
صَلِّ الصَّلاَةَ لِوَقْتِهَا فَإِنْ أَدْرَكْتَ مَعَهُمْ فَصَلِّ وَلاَ تَقُلْ إِنِّي صَلَّيْتُ فَلاَ أُصَلِّي