اللَّهُمَّ لَا تَجْعَلْهُ آخِرَ الْعَهْدِ مِنِّي…
Source: Source: duas.org · ramadan-day-30
O Allah, do not make this the last of my connection with You. O Allah, and let me live to its likes for years and centuries. Peace be upon you, O month of Ramadan. O Allah, O the True in promise do not make the month of Ramadan the last of my connection with it. I entrust You, O month of Ramadan, with peace, satisfaction, acceptance. O Allah, O Lord, do not leave me in despair of Your mercy for me and Your pardon for me. O Allah, fulfill my good assumption of You, O He who is not confused by assumptions, O He who does not forget those who remember Him,
Reference / Source
Source: duas.org · ramadan-day-30