The Book of Prayers (Kitab Al-Salat)
Muslim :: Book 4 : Hadith 1150
Abu Sa'id al-Khudri reported: The Messenger of Allah (may peace be upon him) along with his Companions happened to pass by a field in which onions were sown. The people stopped there and ate out of that, but some of them did not eat. Then they (Propbet's Companions) went to him. He (first) called those who had not eaten the onions and kept the others (who had taken onions) waiting till its odour vanished.