Musnad Abu Ya'la al-Mawsili 148:41

Salih ibn Harb Abu Ma'mar narrated to us, Salam ibn Abi Khubzah narrated to us, Hanzalah narrated to us, from Anas ibn Malik, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever eats from these two plants—garlic and onions—let him not approach our place of prayer, and let him come to me so that I may wipe his face and seek refuge for him."