Is it permissible to combine the intention of different voluntary fast with the six days of Shawwaal? Shaykh Muhammad ibn Hizaam

Our Shaykh, Muhammad ibn Hizaam -may Allaah preserve him- was asked the following question:

📩 Question: 

Is it permissible to combine the intention of different voluntary fast with the six days of Shawwaal?

📝 Answer: 

Yes, it's permissible; such as fasting Mondays and Thursdays; if a person fasts consecutive Mondays and Thursdays during Shawwaal, equalling six days in total, he would have attained the virtue of fasting the six days of Shawwaal, even if he didn't intend to fast the six days of Shawwaal; he would still come under the virtue:

((ثم أتبعه ستا من شوال)) 

"and then follows it by fasting six days of Shawwaal", because the generality in this hadeeth still applies to him. 

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