It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that on the occasion of Laylat al-Jinn, two men among them stayed behind and said, "We will perform the Fajr prayer with the Prophet (peace and blessings be upon him)." The Prophet (peace and blessings be upon him) asked me, "Abdullah! Do you have water with you?" He replied, "I do not have water, but I do have nabidh in a vessel." The Prophet (peace and blessings be upon him) said, "This is pure dates and it is purifying as well." Thus, the Prophet (peace and blessings be upon him) performed ablution with it.