Who is Muhammad al-Sayeh, when did he die, what are his works, and why is his grave five meters long?

Muhammad Al-Sa'ih found a biography for Dhalim ibn Muhammad Al-Sa'ih in Tabaqat Al-Awliya' (Ranks of Saints), where it was mentioned that he said: "The foundation of this matter lies in three things: tranquility with Allah, little food, and fleeing from people." Abu Bakr Ahmad ibn Muhammad Al-Sa'ih was also mentioned in the chain of narration. In any case, taking the graves of saints as shrines, mosques, and places for people to gather for worship is a reprehensible innovation.