Nahj al-Balāgha
Hadith 2231٤١٤. وَفِي خَبَرٍ آخَرَ أَنَّهُ (عليه السلام) قَالَ لِلْأَشْعَثِ بْنِ قَيْسٍ مُعَزِّياً (عَنِ ابْنٍ لَهُ)
414. In another tradition it is related that Amīr al-mu’minīn, peace be upon him, said to al-Ash‘ath ibn Qays by way of condolence on the death of his son: