'Due' in the Bible

It came about in due time, after Hannah had conceived, that she gave birth to a son; and she named him Samuel, saying, “Because I have asked him of the Lord.”

The people came into the woods and there was flowing honey, but no one put his hand to his mouth to eat it because the people were afraid due to the oath.

David said to Ahimelech, "Is there no sword or spear here at your disposal? I don't have my own sword or equipment in hand due to the urgency of the king's instructions."