sentences:  Abraham (brother of Samuel Catz of Lask) was an ascetic of a remarkable type; he fasted six days of the week, from Sabbath night to Sabbath eve, but feasted quite luxuriously on the Sabbath.Often he devoted entire days and nights to the study of the Torah, standing upright during that time.He took his daily ablutions in the river before offering his prayers in the morning, often breaking through the ice in winter for this purpose.