It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the people with the most accurate insight (discernment) are three: first, the Aziz of Egypt, when he said to his wife (about Sayyiduna Yusuf, peace be upon him): "Make his stay comfortable; perhaps he will benefit us or we may adopt him as a son" [Surah Yusuf: 21] ; second, the woman (Sayyidah Safurah) who said (to her father about Sayyiduna Musa, peace be upon him): "O my father, hire him; indeed, the best one you can hire is the strong and trustworthy" [Surah al-Qasas: 26] ; and third, Abu Bakr al-Siddiq (may Allah be pleased with him), when he chose Sayyiduna Umar (may Allah be pleased with him) (for the caliphate) through his insight. This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), and they did not record it.

It is narrated from Abu Wa'il (may Allah have mercy on him) that he said: I heard Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) recite (the word) "hayta lak" [Surah Yusuf: 23] . When he was asked about this (regarding its recitation), he said: "This is how we were taught." This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), and they did not record it.