ʿUyūn akhbār al-Riḍā
Hadith 180180 - وَبِهذَا الإِسناد قالَ: قالَ رَسُولَ اللَّهِ صَلَّى اللهُعَلَيْهِ وَآلِهِ: تَخَتَموا بِالعَقيقِ فَإِنَّهُ لا يُصِيبُ أَحَدَكُم غَمٌّ ما دامَ ذلِكَ عَلَيْهِ.
31-180 According to the same documentation, God’s Prophet (S) said, “Wear agate rings for you will not get sad as long as you wear them.”