A Jerusalem district court found Yishai Schlissel guilty of murder on Tuesday in connection with the murder of a teenage girl in 2015.
Last July, Schlissel attacked the Jerusalem gay pride parade, stabbing six. One of his victims, Shira Banki, died from her injuries after the attack.
Schlissel carried out the attack shortly after he was released from prison.
A father of four from the haredi town of Modi’in Illit, Schlissel had been convicted and sentenced to 12 years in prison for a similar attack on the 2005 Jerusalem gay pride parade. Three people were wounded in that attack.
Schlissel was released early, however, after a court reduced his sentence by two years.