Mishkat al-Masabih 13 Marriage كتاب النكاح 62

وَعَنْهَا قَالَتْ: تَزَوَّجَنِي رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي شَوَّالٍ وَبَنَى بِي فِي شَوَّالٍ فَأَيُّ نِسَاءِ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ أَحْظَى عِنْدَهُ مِنِّي؟ . رَوَاهُ مُسلم

She said: “God’s Messenger married me in Shawwal and cohabited with me in Shawwal, so which of the wives of God’s Messenger was more beloved by him than I?” Muslim transmitted it.