أَنَّهُ قالَ: عَلَيْكُمْ بِالقَرعِ فَإِنَّهُ يَزِيدُ في الدِّماغِ.
Similar narrations
ʿUyūn akhbār al-Riḍā #13731-137 According to the same documentation, Ali ibn Abi Talib (a.s.) said, “I advise you to eat gourds since they strengthen mental powers.”