اَللَّهُمَّ رَبَّ جِبْرَائِيْلَ وَمِيْكَائِيْلَ وَإِسْرَافِيلَ فَاطِرَ السَّمَوَاتِ وَالْأَرْضِ عَالِمَ الْغَيْبِ وَالشَّهَادَةِ أَنْتَ تَحْكُمُ بَيْنَ عِبَادِكَ فِيمَا كَانُوا فِيهِ يَخْتَلِفُونَ اِهْدِنِيْ لِمَا اخْتُلِفَ فِيهِ مِنَ الْحَقِّ بِإِذْنِكَ إِنَّكَ تَهْدِيْ مَنْ تَشَاءُ إِلَى صِرَاطٍ مُسْتَقِيْمٍ

Allaahumma rabba jibraa-eel, wameekaa-eel, wa-israafeel faatiras-samawaati wal-ardi, ‘Aalimal-ghaybi wash-shahadati, anta tahkumu bayna ‘ibaadika feemaa kaanoo feehi yakhtalifoon. ihdinee limakh-tulifa feehi minal-haqqi bi-idhnika, innaka tahdee man tasha-o ilaa siratin mustaqeem

O Allah, Lord of Jibra-eel, Meeka-eel and Israfeel (great angles), Creator of the heavens and the Earth, Knower of the seen and the unseen. You are the arbitrator between Your servants in that which they have disputed. Guide me to the truth by Your leave, in that which they have differed, for verily You guide whom You will to a straight path. Ayesha said that the Prophet (ﷺ) used to recite this dua at the beginning of the night (tahajjud) prayer.

Reference: Muslim: 770