When Messenger of Allah ﷺ returned on the day (of the battle) of Al-Khandaq (i.e. Trench), he put down his arms and took a bath. Then Gabriel whose head was covered with dust, came to him saying, "You have put down your arms! By Allah, I have not put down my arms yet." Messenger of Allah ﷺ said, "Where (to go now)?" Gabriel said, "This way," pointing towards the tribe of Bani Quraiza. So Messenger of Allah ﷺ went out towards them .  

أَنَّ رَسُولَ اللَّهِ ﷺ لَمَّا رَجَعَ يَوْمَ الْخَنْدَقِ وَوَضَعَ السِّلاَحَ وَاغْتَسَلَ فَأَتَاهُ جِبْرِيلُ وَقَدْ عَصَبَ رَأْسَهُ الْغُبَارُ فَقَالَ وَضَعْتَ السِّلاَحَ فَوَاللَّهِ مَا وَضَعْتُهُ فَقَالَ رَسُولُ اللَّهِ ﷺ فَأَيْنَ قَالَ هَا هُنَا وَأَوْمَأَ إِلَى بَنِي قُرَيْظَةَ قَالَتْ فَخَرَجَ إِلَيْهِمْ رَسُولُ اللَّهِ ﷺ  

When the Prophet ﷺ returned from Al-Khandaq (i.e. Trench) and laid down his arms and took a bath, Gabriel came and said (to the Prophet ﷺ ), You have laid down your arms? By Allah, we angels have not laid them down yet. So set out for them." The Prophet ﷺ said, "Where to go?" Gabriel said, "Towards this side," pointing towards Banu Quraiza. So the Prophet ﷺ went out towards them.  

لَمَّا رَجَعَ النَّبِيُّ ﷺ مِنَ الْخَنْدَقِ وَوَضَعَ السِّلاَحَ وَاغْتَسَلَ أَتَاهُ جِبْرِيلُ عَلَيْهِ السَّلاَمُ فَقَالَ قَدْ وَضَعْتَ السِّلاَحَ وَاللَّهِ مَا وَضَعْنَاهُ فَاخْرُجْ إِلَيْهِمْ قَالَ فَإِلَى أَيْنَ قَالَ هَا هُنَا وَأَشَارَ إِلَى بَنِي قُرَيْظَةَ فَخَرَجَ النَّبِيُّ ﷺ إِلَيْهِمْ