ʿUyūn akhbār al-Riḍā
Hadith 7171 - وَبِهذَا الإِسنادِ قالَ: قالَ رَسُولُ اللَّهِ صَلَّى اللهُعَلَيْهِ وَآلِهِ: إِذا أَكَلتُمُ الثَرِيدَ فَكُلُوا مِن جَوانِبِهِ فَإِنَّ الذُّروَةَ فِيهَا البَرَكَةُ.
31-71 According to the same documentation, God’s Prophet (S) said, “Whenever you are having porridge eat from the side of the dish as there are blessings in the middle.”