The Polish exclamation "Święty Jacku z pierogami!" ("St. Hyacinth and his pierogi!") is an old-time saying, a call for help in some hopeless circumstance. It has derived from two legends. One of them is about his visit on July 13, 1238 to Kościelec. During his visit a hailstorm broke out, destroying crops and leaving people with the terrible prospect of poverty and famine. Hyacinth told them to pray. Next day the crops were miraculously restored. The people then treated Hyacinth to pierogi made from those crops as a token of gratitude. The second legend mentions Hyacinth feeding people with pierogi during a famine caused by the Mongol invasion of 1241.