Dream interpretation by Ibne serin
Mustard seeds: (Mustard; Money; Poison) In a dream, mustard means poison. If one eats mustard in his dream, it means that someone may poison him, or that he may fall into a vicious circle, or acquire an evil reputation. It also means that he may receive clean money, though through awesome hardships. Mustard seeds in a dream only denote good if seen by a physician. Otherwise, for the majority of people, seeing mustard or sesame seeds in a dream means a sickness, a fever, or poison.