Let the day perish wherein I was born, and the night in which it was said, There is a man child conceived.
The night in which - rather, 'the night which said.' The words in italics are not in the Hebrew. Night is personified, and poetically made to speak. So in Job 3:7 and Psalms 19:2. The birth of a male in the East is a matter of joy; often not so of a female.