At hour of cal 4 Maghrib prayer,recite:

At hour of cal 4 Maghrib prayer,recite:
'Allahuma ha'za iqbalu lylika wa'id'baru naharika wa'aswa'thu dua'tika fag'firli.'

"ALLAH,this is the hour of the approach of Thy night & the departure of Thy day & this is the time of Thy Muaddhin's call.