Rabbena Prayer reading and Turkish meaning
رَبَّنَا لَا تُزِغْ قُلُوبَنَا بَعْدَ إِذْ هَدَيْتَنَا وَهَبْ لَنَا مِنْ لَدُنْكَ رَحْمَةً إِنَّكَ أَنتَ الْوَهَّابُ
Rabbena la saltig kulubena ba'de iz hadaytana and heb lana min ladunka mercy inneke ente'l-vehhab.
Rabbana Prayer Turkish Meaning
Our Lord! Do not let our hearts deviate after You have guided us. Grant us mercy from Yourself. Indeed, You are the Most Forgiving. This prayer is a request from Allah to help hearts stay on the right path and not go astray, while at the same time seeking refuge in Allah's infinite mercy. This prayer, which is made to keep their faith and hearts strong, is an indication of the believers' submission to Allah.

The Rabbana Prayer is recited to strengthen the bonds of faith and love in the hearts of believers, to draw closer to Allah and to ask for His help. This prayer has a soothing effect, especially during difficult situations and troubles. In addition, the person seeks forgiveness from Allah and finds inner peace by repenting and praying.
The reasons for reciting the Rabbana Prayer include:

What is the Rabbana Prayer? What Does It Mean, Why Is It Recited?
The Rabbana prayer gives a person spiritual strength and morale. It is considered an important prayer, especially in terms of purity of heart, being on the right path and trusting in Allah. Muslims pray not only for themselves, but also for their loved ones and all of humanity by reciting this prayer. The Rabbana prayer is an effective prayer that helps a person find inner peace and get closer to Allah.
Habertürk