Hadith 31-75

وَبِهذَا الإِسنادِ قالَ: قالَ رَسُولُ اللَّهِ صَلَّى اللهُ عَلَيْهِ وَآلِهِ: التَّوحِيدُ نِصْفُ الدِّينِ وَاستَنزِلوا الرِّزْقَ بِالصَّدَقَةِ.

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.”