In the Muwatta of Imam Maalik (rh) as authenticated by the scholars of Hadith, Abu Bakr al Siddeeq (ra) in the third Rak’ah of Maghrib would recite:
رَبَّنَا لَا تُزِغْ قُلُوبَنَا بَعْدَ إِذْ هَدَيْتَنَا وَهَبْ لَنَا مِن لَّدُنكَ رَحْمَةً إِنَّكَ أَنتَ الْوَهَّابُ
(They say): “Our Lord! Let not our hearts deviate (from the truth) after You have guided us, and grant us mercy from You. Truly, You are the Bestower.”
This is the one that is the best of all creation after the Prophets. The one that was promised Jannah and yet in his old age was still asking not to be misguided! So what about us!?