Reference : Hisn al-Muslim 120

اللّهُـمَّ إِنِّي عَبْـدُكَ
ابْنُ عَبْـدِكَ
ابْنُ أَمَتِـكَ
نَاصِيَتِي بِيَـدِكَ
مَاضٍ فِيَّ حُكْمُكَ
عَدْلٌ فِيَّ قَضَاؤكَ
أَسْأَلُـكَ بِكُلِّ اسْمٍ هُوَ لَكَ
سَمَّـيْتَ بِهِ نَفْسَكَ
أِوْ أَنْزَلْتَـهُ فِي كِتَابِكَ 
أَوْ عَلَّمْـتَهُ أَحَداً مِنْ خَلْقِـكَ
أَوِ اسْتَـأْثَرْتَ بِهِ فِي عِلْمِ الغَيْـبِ عِنْـدَكَ
أَنْ تَجْـعَلَ القُرْآنَ رَبِيـعَ قَلْبِـي
وَنورَ صَـدْرِي
وجَلَاءَ حُـزْنِي
وذَهَابَ هَمِّـي
Allāhumma innī `abduk, 
ibnu `abdik, 
ibnu amatik, 
nāsiyatī biyadik, 
māḍin fiyya ḥukmuk,
`adlun fiyya qaḍā'uk, 
as'aluka bikullis’min huwa lak, 
sammayta bihi nafsak, 
aw anzaltahu fī kitābik, 
aw `allamtahu aḥadan min khalqik, 
aw‘ista'tharta bihi fī `ilmil-ghaybi `indak,
an taj`ala ‘l-Qur'āna rabī`a qalbī, 
wa nūra ṣadrī, 
wa jalā'a ḥuznī, 
wa dhahāba hammī.


O Allah, I am Your slave,
and the son of Your male slave,
and the son of your female slave. 
My forehead is in Your Hand (i.e. you have control over me). 
Your Judgment upon me is assured,
and Your Decree concerning me is just. 
I ask You by every Name that You have named Yourself with, 
revealed in Your Book, 
taught any one of Your creation, 
or kept unto Yourself in the knowledge of the unseen that is with You, 
to make the Qur'an the spring of my heart,
and the light of my chest,
the banisher of my sadness,
and the reliever of my distress.

Reference:
Ahmad 1/391, and Al-Albani graded it authentic.

Chapter: For anxiety and sorrow