Mohammed Saleem's daugher Shazia Khan was among relatives who watched from the public gallery as sentence was passed.
Mr Justice Sweeney read her victim impact statement that said the effect of her father's violent death was "a rollercoaster experience where the ride will never end".
The shock and sadness of the reality is impossible to accept, yet alone accept and move on. We can't move forward, the murder has disabled our minds in every emotional way possible.
Dad did not die of old age or illness, he died because he was stabbed violently in the back by a gutless coward who did not have the courage to face him before he took his life away.
She said that her mother cannot accept the death of her husband of more than 50 years, and is haunted by thoughts that she could have saved him.
Our mother weeps to this day. She was minutes away from him. She could have saved him and she will always blame herself for this.