بسم الله الرحمن الرحيم
We have only a few days left from the month of Sha'ban. In these remaining days, you may repeat the following supplicatory prayer (which Imam Reza taught one of his companions) very much for almighty Allah saves many people and forgives them on account of the sanctity of this month:
اللَّهُمَّ إِنْ لَمْ تَكُنْ قَدْ غَفَرْتَ لَنَا فِي مَا مَضَى مِنْ شَعْبَانَ فَاغْفِرْ لَنَا فِيمَا بَقِيَ مِنْهُ.
O Allah, if you have not forgiven us in the past days of Sha'ban, (please do) forgive us in the rest of it.
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