It is narrated from Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) that the Companions of the Prophet (peace and blessings be upon him) would go to al-Awali, and the time of Maghrib would come upon them near Mirbad al-Na'am, so they would perform tayammum (dry ablution).
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5694