Abu Bakr al-Hanfi عبد الكبير بن عبد المجيد- أبو بكر الحنفي · Chapters on Recitation

"On the Day of (the battle of) Badr, the Romans had a victory over the Persians. So the believers were pleased with that, then the following was revealed: Alif Lam Mim. The Romans have been defeated..." up to His saying: '...the believers will rejoice. (30:1-4)" He said: "So the believers were happy with the victory of the Romans over the Persians.