However, scholars caution that such formulations may not be authentically established. The safest and most authentic Mustajab dua is the one from Surah Al-Anbiya.
Assalaatu Wassalaamu Alaika Ya Rasoolullaah Sallallaahu Ta'ala 'Alaihi Wa Sallam." Why Recite This Dua? dua e mustajab in english transliteration
In the name of Allah, the Most Gracious, the Most Merciful. However, scholars caution that such formulations may not