Because the Bible was written to actual human beings by actual human beings to convey actual ideas, sometimes words and concepts are used anachronistically. If someone is talking about the foundation of the city of Rome, they may say that “Romulus and Remus arrived at Rome around 750 BC”. Although the city was not yet founded, it is normal to give listeners an adequate understanding of events by anachronistically using words and concepts. The Bible does this several times:
Gen 21:14 And Abraham rose up early in the morning, and took bread, and a bottle of water, and gave it unto Hagar, putting it on her shoulder, and the child, and sent her away: and she departed, and wandered in the wilderness of Beersheba.
Gen 21:31 Wherefore he called that place Beersheba; because there they sware both of them.
Gen 21:32 Thus they made a covenant at Beersheba: then Abimelech rose up, and Phichol the chief captain of his host, and they returned into the land of the Philistines.
Before Beersheba is even named, Abraham is said to be wandering in the wilderness of Beersheba. Likewise, take an example from the New Testament. In Luke the story develops John the Baptist far into his ministry before it introduces the birth of Christ:
Luk 1:80 And the child [John the Baptist] grew, and waxed strong in spirit, and was in the deserts till the day of his shewing unto Israel.
[very next verse is Luk 2:1]
Luk 2:1 And it came to pass in those days, that there went out a decree from Caesar Augustus, that all the world should be taxed.
Luk 2:5 To be taxed with Mary his espoused wife, being great with child.
Someone wishing to critique the Bible might object that this was introduced anachronistically. But because human beings converse, write, and explain concepts anachronistically, these critiques should be ignored. Anachronistic use of words are normal in conversation, especially if they are used to convey meaningful concepts.