عَنْ سَلَمَةَ الْعَلَوِيِّ قَالَ سَمِعْتُ أَنَسَ بْنَ مَالِكٍ رَضِيَ اللَّهُ عَنْهُ يَقُولُ لَمَّا نَزَلَتْ آيَةُ الْحِجَابِ جِئْتُ أَدْخُلُ كَمَا كُنْتُ أَدْخُلُ فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ ((وَرَاءَكَ يَا بُنَيَّ))
It is narrated from Sayyiduna Anas (may Allah be pleased with him), he says: When the verse of veiling was revealed, I came to enter your house as I used to enter before, but this time the Noble Prophet (peace and blessings be upon him) said: Dear son! Step back (now the command of veiling has come).