It was narrated that Ibn ‘Abbas said:“When praying at night (Qiyamul-Lail), the Messenger of Allah (ﷺ) used to say between the two prostrations: ‘Rabbighfir li warhamni wajburni warzuqni warfa’ni (O Lord, forgive me, have mercy on me, improve my situation, grant me provision and raise me in status).’”

English translation · Sunan Ibn Majah