Mishkat al-Masabih, hadith 768

عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ قَالَ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا اسْتَفْتَحَ الصَّلَاةَ كَبَّرَ ثُمَّ قَالَ: «إِنَّ صَلَاتِي وَنُسُكِي وَمَحْيَايَ وَمَمَاتِي لِلَّهِ رَبِّ الْعَالَمِينَ لَا شَرِيكَ لَهُ وَبِذَلِكَ أَمَرْتُ وَأَنَا مِنَ الْمُسلمين اللَّهُمَّ اهدني لِأَحْسَنِ الْأَعْمَالِ وَأَحْسَنِ الْأَخْلَاقِ لَا يَهْدِي لِأَحْسَنِهَا إِلَّا أَنْتَ وَقِنِي سَيِّئَ الْأَعْمَالِ وَسَيِّئَ الْأَخْلَاقِ لَا يَقِي سَيِّئَهَا إِلَّا أَنْتَ» . رَوَاهُ النَّسَائِيُّ

Jabir said that when the Prophet began prayer he said the takbir, then said, “My prayer and my devotion, my life and my death belong to God, the Lord of the universe, who has no partner. I have been so commanded, and I am the first of the Muslims. O God, guide me to the best deeds and the best qualities, Thou who alone canst guide to the best of them; and guard me from evil deeds and evil qualities, Thou who alone canst guard from their evil ones.” Nasa’i transmitted it.