ENOfficial
Abu Ziyad told that when he asked ‘A’isha about onions she replied that the last food God’s messenger ate was some which contained onions. Abu Dawud transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَن أبي زيادٍ قَالَ: سُئلتْ عائشةُ عَنِ الْبَصَلِ فَقَالَتْ: إِنَّ آخِرَ طَعَامٍ أَكَلَهُ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ طَعَامُ فِيهِ بصل. رَوَاهُ أَبُو دَاوُد
sunnah.com