عَنْ زَيْدِ بْنِ أَرْقَمَ رَضِيَ اللَّهُ عَنْهُ قَالَ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ فِي دُبُرِ صَلَاتِهِ: ((اللَّهُمَّ رَبَّنَا وَرَبَّ كُلِّ شَيْءٍ أَنَا شَهِيدٌ أَنَّكَ أَنْتَ الرَّبُّ وَحْدَكَ لَا شَرِيكَ لَكَ (قَالَ إِبْرَاهِيمُ مَرَّتَيْنِ) رَبَّنَا وَرَبَّ كُلِّ شَيْءٍ، أَنَا شَهِيدٌ أَنَّ مُحَمَّدًا عَبْدُكَ وَرَسُولُكَ، رَبَّنَا وَرَبَّ كُلِّ شَيْءٍ، أَنَا شَهِيدٌ أَنَّ الْعِبَادَ كُلَّهُمْ إِخْوَةٌ، اللَّهُمَّ رَبَّنَا وَرَبَّ كُلِّ شَيْءٍ! اجْعَلْنِي مُخْلِصًا لَكَ وَأَهْلِي فِي كُلِّ سَاعَةٍ مِنَ الدُّنْيَا وَالْآخِرَةِ، ذَا الْجَلَالِ وَالْإِكْرَامِ! اسْمَعْ وَاسْتَجِبْ، اللَّهُ الْأَكْبَرُ الْأَكْبَرُ نُورُ السَّمَاوَاتِ وَالْأَرْضِ، اللَّهُ الْأَكْبَرُ الْأَكْبَرُ حَسْبِيَ اللَّهُ وَنِعْمَ الْوَكِيلُ، اللَّهُ الْأَكْبَرُ الْأَكْبَرُ))
It is narrated from Sayyiduna Zayd bin Arqam (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) used to supplicate after his prayer: O Allah! Our Lord and the Lord of everything, I bear witness that You alone are the Lord, You have no partner. Our Lord and the Lord of everything, I bear witness that Muhammad is Your servant and Your Messenger. Our Lord and the Lord of everything, I bear witness that all the servants are brothers. O Allah! Our Lord and the Lord of everything! Make me and my family sincere to You in every moment of this world and the Hereafter. O Possessor of Majesty and Honor! Hear and accept. Allah is the Greatest, Allah is the Greatest, the Light of the heavens and the earth. Allah is the Greatest, Allah is the Greatest, Allah is sufficient for me and He is the best Disposer of affairs. Allah is the Greatest, Allah is the Greatest.