Supplications to be recited while standing at safa and marwah

إِنَّ الصَّفَا وَالْمَرْوَةَ مِنْ شَعَائِرِ اللهِ أَبْدَأُ بِمَا بَدَأَ اللهُ بِهٖ

Surely ṣafa and Marwah are among the signs of Allah. I begin by that which Allah began.
“Whenever the Prophet ﷺ approached Mount ṣafa, he would recite: He began (his Sa’i) at Mount ṣafa climbing it until he could see the House. He then faced the Qiblah repeating the words: ، اَ للّٰهُ أَكْبَرُ – لَاۤ إِلٰهَ إِلاَّ اللّٰهُ Then he said: [Recite Next (2nd) Dua.”

[Sahih Muslim 2/888]

لَآ إِلٰهَ إِلَّا اللهُ وَحْدَهٗ لَا شَرِيْكَ لَهٗ، لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ وَهُوَ عَلٰى كُلِّ شَيْءٍ قَدِيْرٌ، لَآ إِلٰهَ إِلَّا اللهُ وَحْدَهٗ أَنْجَزَ وَعْدَهٗ، وَنَصَرَ عَبْدَهٗ وَهَزَمَ الْأَحْزَابَ وَحْدَهٗ

None has the right to be worshipped but Allah alone, Who has no partner, His is the dominion and His is the praise, and He is Able to do all things. None has the right to be worshipped but Allāh alone, He fulfilled His Promise, He aided His slave, and He alone defeated the Confederates.
Then he would ask Allah for what he liked, repeating the same thing like this three times. He did at Mount Marwah as he did at Mount ṣafa.

[Sahih Muslim – 1218]