On the autherity of Ayesha (RA), she said, The Messenger of Allah (ﷺ) supplicate like this:

اَللَّهُمَّ اجْعَلْ أَوْسَعَ رِزْقِكَ عَلَيَّ عِنْدَ كِبَرِ سِنِّيْ وَانْقِطَاعِ عُمُرِيْ

Allaahummaj-‘al awsa’a rizqika ‘alayya ‘inda kibari sinni wan-qitaa’i ‘umuri

O Allah, make my sustenance the most plentiful in my old age and during the last days of my life.

Reference: Sahih (Suyuti). Jami' as-Sagir: 1485