السلام عليكم ورحمة الله وبركاته Is it permissible to combine the intention of making up missed Ramadan fasts with the intention of fasting voluntary fasts for the first 9 days of Dhul Hijjah?

Ustadh AbdulAziz al-Haqqan

The correct saying is that your niyyah should be for making them up, after you make them up u can fast voluntarily.