Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:30:5 –

In the victory of Allah. He gives victory to whom He wills, and He is the Exalted in Might, the Merciful.  

in God’s help, to them against the Persians. They ˹the believers˺ indeed rejoiced in this, as they came to know of it on the day that it took place, on the day of ˹the battle of˺ Badr, when Gabriel came down with this ˹news˺ thereon, in addition to their rejoicing in their victory over the idolaters on that ˹same˺ day. He helps whomever He will; and He is the Mighty, the Victor, the Merciful, to believers.
القرآن:٣٠:٥ –

بِنَصْرِ اللَّهِ ۚ يَنْصُرُ مَنْ يَشَاءُ ۖ وَهُوَ الْعَزِيزُ الرَّحِيمُ  

{بنصر الله} إياهم على فارس وقد فرحوا بذلك وعلموا به يوم وقوعه أي يوم بدر بنزول جبريل بذلك مع فرحهم بنصرهم على قتل المشركين فيه {ينصر من يشاء وهو العزيز} الغالب {الرحيم} بالمؤمنين}.