The Man of Greed「その男〈強欲〉につき, Sono Otoko 〈Gōyoku〉 ni Tsuki」 is the 144th chapter of the manga, Nanatsu no Taizai.
Short Summary
Ban faces the Ten Commandments! Galan attempts to finish the fight before it begins, but he and Merascylla are shocked when, despite their best efforts, Ban refuses to die. Impressed by his unique nature, Galan give Ban the opportunity to use Power, which enables Ban to steal their strength. Now with superior strength, Ban unleashes a barrage of strikes against them, forcing them to take him seriously.
Long Summary
Ban, furious at Galan and Merascylla for having made Elaine suffer, snatches his nunchaku and prepares to fight. Before he can move, Galan swiftly performs Critical Strike, slicing Ban, as well as the landscape, in two. Galan complains that the victory is not enough to soothe the anger caused by Meliodas injuring him.
Ban, unscathed from the attack, introduces himself as Undead Ban. Having heard the demons describe Meliodas as a "traitor", he realizes he owes him an apology.
Both Merascylla and Galan attack Ban fatally numerous times, but each fails to kill him. Having never seen such regenerative ability, they conclude that it must not be a component of his Power, but rather a unique trait of his body. Impressed and curious, Galan offers Ban one free hit before he continuing the fight, much to Merascylla's chagrin.
Now given the opportunity, Ban uses Hunter Fest, draining the strength of all those around him, including the two demons. With the stolen strength, Ban strikes both of them, sending them flying. Ban continues his barrage against Galan, who is unable to retaliate. Confused, Galan consults Merascylla, who postulates that Ban has stolen their strength and that he is now stronger than Galan. Ban, now with the upper hand, taunts the two cheerfully.