Yasir Arfat, 54, attacked estranged partner Annah Mohammad with a knife following an argument at a house in Milnpark Gardens, Glasgow, in January 2013.
But in evidence at his trial Arfat, of Kinning Park, Glasgow, who suffers from post traumatic stress disorder, said he couldn't remember stabbing her.
He was charged with attempted murder, but was convicted of the lesser charge of assault to severe injury and danger of life.
Arfat denied attempted murder, but had pled guilty at an early stage in proceedings to the charge he was eventually convicted of by the jury.
Yesterday at the High Court in Glasgow, judge Lord McEwan ordered Arfat to be imprisoned for six years.
He added that if it had not been for his early plea to the offence he would have jailed him for eight years.
Defence counsel Sarah Livingstone, representing Arfat, said: "He accepts what he did was a very bad thing, but he is not a bad man.
"He had an unblemished character until the night of this incident. The complainer had left her husband six months earlier.
"He wanted to take their children to Pakistan to see his father and she would not allow that.
"The evidence at the trial, which must have been accepted by the jury given their verdict, was that she presented a knife at him and was shouting about killing herself and others.
"It beggars belief that he would have assaulted his wife had it not been for his depression, the fact his father was terminally ill in Pakistan and most importantly of all the attack by her.
"It was not his intention to attempt to murder her. After the incident he immediately called for help."
In evidence Arfat said: "I was very scared. I was very upset.
"I can't remember stabbing her."