A jealous husband stabbed his former best man 14 times during a fight after he had an affair with his wife.
Sebastian Haska, 37, was jailed for seven years over the frenzied attack at the flat in Leeds.
A court heard Haska, a Polish national, moved to the UK in 2011 and got married before moving to a flat with his wife and her two children.
The relationship broke down in April last year after Haska’s friend moved in with them when he also came to live in the UK.
Heather Gillmore, prosecuting, said Haska’s wife began a relationship with her husband’s friend and Haska moved out.
But that relationship ended in February this year and Haska and his wife got back together.
On March 27 this year Haska travelled by coach to Leeds from Milton Keynes and rang his wife to tell her he was on his way to her home. She failed to answer the call and Haska became suspicious.
Mrs Gillmore said Haska’s wife had remained in contact with the man and they were looking for jobs on the internet when he arrived at the flat.
Haska let himself into the flat, on Beverley Mount, Beeston, at 9.30pm. He walked up to the victim before punching him repeatedly in the head. Miss Gillmore said: “The defendant was shouting ‘I will kill you’ and the complainant was fighting back.”
Haska took a six-inch knife out of his pocket and stabbed him repeatedly to the body and stomach. Haska then stopped the attack and dialled 999. When police arrived he told officers: “I am responsible for this I stabbed him. We were fighting and I stabbed him.”
The court heard the victim can no longer do his job as a welder because of the injuries he suffered. Haska pleaded guilty to wounding with intent and possession of a bladed article.
Richard Reed, mitigating, said Haska had armed himself with the knife as he knew his friend was an expert in martial arts.
Judge Guy Kearl, QC, said: “The complainant had been a friend of yours -your best man. He had an affair with your wife in the past.
“I accept that there is genuine remorse.
“You called emergency services and you did not leave the scene and tried to assist in every way that you could.”
The judge added“But it was good fortune only that the complainant was not killed.”