Why did Allah mentioned about Satar in Quran

[Sardar Miyan]

Muslims usually take Satar means the extent covering body of Male & Female and observe in daily life and for prayers. But as we see that this aspect of Satar is not mentioned in Quran. As a result Muslims
adopt the Satar as per Hadith narrations. I wonder as to why the important aspect Libas is not mentioned in Quran? Brother Joseph Isalam may kindly clarify thanks.