ʿUyūn akhbār al-Riḍā
Hadith 7575 - وَبِهذَا الإِسنادِ قالَ: قالَ رَسُولُ اللَّهِ صَلَّى اللهُعَلَيْهِ وَآلِهِ: التَّوحِيدُ نِصْفُ الدِّينِ وَاستَنزِلوا الرِّزْقَ بِالصَّدَقَةِ.
31-75 According to the same documentation, God’s Prophet (S) said, “(Confessing to the) Unity of God is half of the religion. Expedite the descending of your sustenance by giving charity.”