Genesis 35:18

18 As she breathed her last—for she was dying—she named her son Ben-Oni.a But his father named him Benjamin.b

Read Genesis 35:18 Using Other Translations

And it came to pass, as her soul was in departing, (for she died) that she called his name Benoni: but his father called him Benjamin.
And as her soul was departing (for she was dying), she called his name Ben-oni;but his father called him Benjamin.
Rachel was about to die, but with her last breath she named the baby Ben-oni (which means “son of my sorrow”). The baby’s father, however, called him Benjamin (which means “son of my right hand”).