Once we find the Straight Path, staying upon it becomes a priority. And so we ask, “Oh Allah, do not let our hearts swerve [off the Straight Path] after you have guided us.” If we are continuously in a state of mercy towards others and vigilance towards ourselves, we may stay firmly upon the path and find God’s mercy everywhere. 

رَبَّنَا لَا تُزِغْ قُلُوبَنَا بَعْدَ إِذْ هَدَيْتَنَا وَهَبْ لَنَا مِن لَّدُنكَ رَحْمَةً إِنَّكَ أَنتَ الْوَهَّاب

rabbanā lā tuzigh qulūbanā baʿda idh hadaytanā wahab lanā min ladunka raḥmatan innaka anta l-wahāb

“Oh Allah, do not let our hearts swerve [off the Straight Path] after you have guided us. And gift us Your mercy; verily, You are the One who gives the most gifts.” [3:8]