Found 5 verses containing laugh and not the word slaughter in the Gospels (Matthew - John).
Showing all verses.

Matthew 9:24 (Show me Matthew 9)
he said, “Go away, for the girl is not dead but sleeping.” And they laughed at him.

Mark 5:40 (Show me Mark 5)
And they laughed at him. But he put them all outside and took the child's father and mother and those who were with him and went in where the child was.

Luke 6:21 (Show me Luke 6)
“Blessed are you who are hungry now, for you shall be satisfied. “Blessed are you who weep now, for you shall laugh.

Luke 6:25 (Show me Luke 6)
“Woe to you who are full now, for you shall be hungry. “Woe to you who laugh now, for you shall mourn and weep.

Luke 8:53 (Show me Luke 8)
And they laughed at him, knowing that she was dead.