It is called the opening supplication of the prayer with a single supplication only
Machine translationRead the Arabic original
Question : Please, peace be upon you, and upon you be peace, yes, your question? A question, a question regarding the opening supplication.
Answer : She says: Honorable Shaykh, regarding the opening supplication, there are several supplications. Is it permissible for me to supplicate with these supplications at the beginning of the prayer?
Answer : She says: Honorable Shaykh, regarding the opening supplication, there are several supplications. Is it permissible for me to supplicate with these supplications at the beginning of the prayer?
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 1731- يدعى بدعاء الاستفتاح بالصلاة بدعاء واحد فقط /سؤال على الهاتف 📞 /ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.