This appears to be clearly indicated in 1 Corinthians .
The principle stated in 2 Corinthians -18 would seem to apply to marriage as well, and some might see it as applying to dating.
In particular these specific verses are not in the New International Version (NIV) main text.
Note: In the New International Version, the following verses are absent from the main text, but have been translated for inclusion in the footnotes (fn).
In Philippians 4:6-7, Paul says, “Do not be anxious about anything, but in everything by prayer and supplication with thanksgiving let your requests be made known to God.
Do not spare them, but kill both man and woman, child and infant, ox and sheep, camel and donkey.’” (1 Samuel 15:3) No.Some Bible verses in the New Testament that are present in the King James Version (KJV) are absent (or appear as footnotes) in some Bible translations completed after the publication of The New Testament in the Original Greek in 1881 and the later Novum Testamentum Graece (first published in 1898 and revised many times since that date).These editions of the Greek text took into account early manuscripts of the New Testament which had not been available to translators before the 19th century, notably those of the Alexandrian text-type.I think it is true that our young people date too young, and that many dating situations are unwise in that they create unnecessary temptations and, even if nothing wrong takes place, a couple’s actions may give the appearance of evil.Many of the dating and personal relationship safeguards of years gone by seem to have been cast aside.