When El Hadj Omar and his fanatical hordes came to devastate Massina, Hamet Beckay did his utmost to stop the course of the Toucouleur conqueror, by urging on him his own interpretation of the Mussulman religion, which he also professed: an interpretation too noble and elevated to be adopted by any but a few votaries. It was all in vain; his remonstrances were unheeded by El Hadj. Beckay had to be content with organizing a stout resistance; he summoned to arms his faithful friends the Tuaregs and the Fulahs, his former adversaries. But, alas! he died at Saredina before he could accomplish anything. The story goes, that when in perfect health he was seized with a gloomy presentiment of his approaching end. He called his intimate friends together, telling them that he might perhaps soon be summoned to make a distant journey, and giving to them his turban and his sword, the former for his son Abiddin, the latter for his son-in-law, Beckay Uld Ama Lamine, which signified that he bequeathed his spiritual power to Abiddin and his temporal authority to Ama Lamine. Then he begged to be left alone to pray during the hour of the siesta. When his followers returned they found the great marabout, his chaplet, clasped in his hands, and his eyes closed in an attitude of ecstasy. After watching him for a short time they became alarmed at his immobility, they touched him to try and awake him. But his lifeless body fell to the ground, the spirit of Hamet Beckay had left its earthly tabernacle. Beckay Uld Ama Lamine continued the struggle begun by his father-in-law, and to him and his faithful adherents is due the honour of having besieged and killed El Hadj Omar at Hamdallahi. The blood-stained course of the Toucouleurs was checked for the moment, and the Western Sudan was saved from falling into the hands of the ferocious warriors of El Hadj.