To know that, you have to calculate the time from sunset until the break of dawn (Fajr). You then divide this into 3 to know the last third of the night.

I would like to know the duration of the last one third part of the night

Prayer | March 25, 2014 9:23 am
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Is there a specific dua which you might say, so that Allah keeps you away from dirty thoughts, girls and sexual relationships/ideas?