It wasnarrated that Ibn 'Abbas said:
"When praying at night(Qiyamul-Lail), the Messenger of Allah (ﷺ) used to say between thetwo prostrations: 'Rabbighfir li warhamni wajburni warzuqniwarfa'ni(O Lord, forgive me, have mercy on me, improve mysituation, grant meprovision and raise me in status).'" (TH)
English reference (TH): Vol. 1, Book 5, Hadith 898 (TH)
Arabic reference (TH): Book 5, Hadith 948 (TH)