# at the cost of the life of Abiram, his firstborn son

"and the consequence of his sin was that Abiram, his firstborn son, died" 

# Segub, his youngest son, lost his life

"Segub, his youngest son, died"

# while he was building the gates of the city

"while Hiel was building the gates of the city"

# in keeping with the word of Yahweh

"according to the word of Yahweh"

# which he spoke by Joshua son of Nun

"which Yahweh caused Joshua son of Nun to speak"