It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) was asked about khatt (drawing lines in the sand to foretell things), and he ((peace and blessings be upon him)) said: "It is a remnant of knowledge."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10679