103. hadíth
قَالَ: وَ سَأَلْتُهُ عَنِ اَلْقَيْءِ فِي شَهْرِ رَمَضَانَ قَالَ «إِنْ كَانَ شَيْءٌ يَذْرَعُهُ فَلاَ بَأْسَ وَ إِنْ كَانَ شَيْءٌ يُكْرِهُ عَلَيْهِ نَفْسَهُ فَقَدْ أَفْطَرَ وَ عَلَيْهِ اَلْقَضَاءُ ».
He said: I asked him about vomiting during the Month of Ramadan. Imam (a.s) said: "If it happens involuntarily, there is no harm. However, if he forces himself to vomit, then his fast is invalidated, and he must make it up."