During a fight, he stabbed his victim twice - injuring the liver and chest.
Chiam Kim Ghee, 52, was jailed for three months after pleading guilty on Monday to one count of affray - disturbing the peace by fighting in a public place.
The mover admitted to using an unspecified sharp object to stab Mr Samson Lee Mong Hu, 54, in the abdomen and on the chest at a coffee shop at Block 421, Ang Mo Kio Avenue 10, around midnight on Jan 6.
A second charge of voluntarily causing hurt to another man, Mr Ang Thiam Chye, by using a glass bottle to hit his head, was taken into consideration during sentencing.
The court heard that Mr Lee was drinking alone at the coffee shop when Chiam, who was drinking with his friends, asked him to come over.
Court papers did not say why he had done that. They spoke and Chiam asked Mr Lee to follow him to the back of the eatery, where they fought.
During the scuffle, Chiam took out the sharp object and stabbed Mr Lee. When Mr Ang tried to separate them, Chiam hit his head with a glass bottle.
Someone called the police and the two men stopped fighting when officers showed up.
Deputy Public Prosecutor Jason Chua said Mr Lee was hospitalised for four days for his injuries.
For his involvement in the fight, he was also convicted of affray and fined $1,500 on Aug 2.
Those convicted of affray can be jailed for up to a year and fined up to $5,000.
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