Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "If my Ummah knew what benefit there is for them in hilbah (fenugreek), they would ask for it back, even if they had to pay its weight in gold."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17323