I don’t want to get into debating the meaning of the Bible because I feel like a lot of people are going to argue in this one but there are some pretty strong passages.
“Now it came about when he had finished speaking to Saul, that the soul of Jonathan was knit to the soul of David, and Jonathan loved him as himself” 1 Samuel 18:1
If you are interested, there are other old documents as well that do actually use the term twin flame. Old documents back in the 1800s shows some modern twin flame history. Really cool to see.