[Machine] When the Messenger of Allah ﷺ arrived in Medina, the Abyssinians played with their spears in joy of his coming. If this story, as narrated by Aisha, is true, then it indicates that she was not mature at that time. The Messenger of Allah ﷺ built it (a mosque) when he arrived in Medina, and she was nine years old at the time. It is possible that this was before the hijab was obligated for them.  

لَمَّا قَدِمَ رَسُولُ اللهِ ﷺ الْمَدِينَةَ لَعِبَتِ الْحَبَشَةُ بِحِرَابِهِمْ فَرَحًا بِقُدُومِهِ فَإِنْ كَانَتْ هَذِهِ الْقِصَّةُ وَمَا رَوَتْهُ عَائِشَةُ وَاحِدَةً فَفِيهَا مَا دَلَّ عَلَى أَنَّهَا كَانَتْ غَيْرَ بَالِغَةٍ فِي ذَلِكَ الْوَقْتِ فَرَسُولُ اللهِ ﷺ بَنَى بِهَا حِينَ قَدِمَ الْمَدِينَةَ وَهِيَ ابْنَةُ تِسْعِ سِنِينَ وَيُحْتَمَلُ أَنَّ ذَلِكَ كَانَ قَبْلَ أَنْ يُضْرَبَ عَلَيْهِنَّ الْحِجَابُ