https://torontodawah.com/is-there-double-reward-for-the-one-who-makes-up-his-missed-fast-in-the-ten-days-of-dhul-hijjah-and-is-there-a-prohibition-in-the-legislation-in-regards-to-marrying-on-the-first-day-of-safar-umm/
Is There Double Reward For The One Who Makes Up His Missed Fast In The Ten Days Of Dhul Hijjah And Is There A Prohibition In The Legislation In Regards To Marrying On The First Day Of Safar - Umm Abdillaah Daughter Of Shaykh Muqbil bin Hadi al-Wadi'i, And Shaykh Ibn Uthaymeen