ʿUyūn akhbār al-Riḍā
Hadith 8787 - وَبِهذَا الإِسنادِ عَنْ عَلِىِّ بْنِ أَبِي طالِب عَلَيْهِالسَّلامُ أَنَّهُ قالَ: عَلَيْكُمْ بِالقَرعِ فَإِنَّهُ يَزِيدُ في الدِّماغِ.
31-87 According to the same documentation, Ali ibn Abi Talib (a.s.) said, “When you cook use a lot of gourds since it strengthens mental powers.”