Hadith on Prayer: Perform your prayer as if it is your last

Abu Ayyub reported: A man came to the Prophet, peace and blessings be upon him, and he said, “O Messenger of Allah, teach me and make it concise.” The Prophet said, “When you stand for your prayer, pray as if you are saying farewell. Do not say anything for which you must apologize, and give up any desire to acquire what people have.

Source: Sunan Ibn Mājah 4169

Grade: Sahih (authentic) according to Al-Albani

عَنْ أَبِي أَيُّوبَ قَالَ جَاءَ رَجُلٌ إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ يَا رَسُولَ اللَّهِ عَلِّمْنِي وَأَوْجِزْ قَالَ إِذَا قُمْتَ فِي صَلَاتِكَ فَصَلِّ صَلَاةَ مُوَدِّعٍ وَلَا تَكَلَّمْ بِكَلَامٍ تَعْتَذِرُ مِنْهُ وَأَجْمِعِ الْيَأْسَ عَمَّا فِي أَيْدِي النَّاسِ

4169 سنن ابن ماجه كتاب الصلاة أبواب مواقيت الصلاة

742 المحدث الألباني خلاصة حكم المحدث صحيح في صحيح الجامع