Al-Kāfi
Hadith 21714ـ وَبِهَذَا الإسْنَادِ قَالَ قَالَ رَسُولُ الله (صَلَّى اللهُ عَلَيْهِ وآلِه) التَّوَدُّدُ إِلَى النَّاسِ نِصْفُ الْعَقْلِ.
4. Through the same chain of narrators it is narrated from Abu ‘Abdillah (a.s.) who has said the following: “The Messenger of Allah has said, ‘Showing that one loves people is half (the power) of reason.’”