Regular Litanies After the Fard Prayer
Question
May one, after the fard of Zuhr, Maghrib and ‘Isha’, sit for two or three minutes and complete certain special regular litanies, or should one pray the sunna right away immediately after the fard and recite those litanies after it?
Answer
There is latitude either way; it is better to recite them after the sunnas.
Source: Fatawa Mahmudiyya
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