"And he did not remain long," meaning: he returned immediately. "He said: I have attained knowledge of what you have not attained," Al-Hasan said: He is saying: I have known what you have not known. "And I have come to you from Sheba with certain news," meaning: with true information. And (Sheba) in the interpretation of Al-Hasan is...
﴿فَمَكثَ غير بعيد﴾ أَيْ: رَجَعَ مِنْ سَاعَتِهِ ﴿فَقَالَ أَحَطْتُ بِمَا لَمْ تُحِطْ بِهِ﴾ قَالَ الْحَسَنُ: يَقُولُ: عَلِمْتُ مَا لَمْ تَعْلَمْ ﴿وَجِئْتُكَ مِنْ سَبَإٍ بنبإ يَقِين﴾ أَيْ: بِخَبَرٍ حَقٍّ. وَ (سَبَأٌ) فِي تَفْسِيرِ الْحَسَنِ