'Due' in the Bible

Because Israel was deeply impoverished due to the Midianites, they cried out to the LORD.

and build an altar to the LORD your God on the top of the stronghold here, with stones laid in due order; then take the second bull, and offer it as a burnt offering with the wood of the Ashe'rah which you shall cut down."

So the woman [in due time] gave birth to a son and named him Samson; and the boy grew and the Lord blessed him.