رَبِّ أَسْأَلُكَ خَيْرَ مَا فِيْ هٰذَا الْيَوْمِ وَ خَيْرَ مَا بَعْدَهٗ ـ

Rabbi as’aluka khayra maa fii haadhal-yawmi wa khayra maa ba’dah.

(‘Abdullah ibn Mas’ud. Sunan at-Tirmidhi #3312)

O Lord, I beg You for the good of this day and the good of what will come after it.

At night, one should say: رَبِّ أَسْأَلُكَ خَيْرَ مَا فِيْ هَذِهِ اللَّيْلَةِ وَ خَيْرَ مَا بَعْدَهَا (O Lord, I beg You for the good of this night and the good of what comes after it.)

(Source: Khalid Baig’s translation and commentary of du’aa #90 in the Accepted Whispers: Munajat-e-Maqbul)