Ibn 'Abbas (RA):
The Prophet (ﷺ) used to say between the two prostrations: "Allahumma ighfir li, warhamni, wahdini, wa 'afini, warzuqni (O Allah, forgive me, have
mercy on me, guide me, grant me health and well-being, and provide sustenance for me)."
[Reported by al-Arba'a except An-Nasa'i, and this is the wording of Abu Dawud. Al-Hakim graded it Sahih (authentic)].