1 Timothy 4:12-16

12Don’t let anyone look down on you because you are young, but set an example for the believers in speech, in life, in love, in faith and in purity. 13Until I come, devote yourself to the public reading of Scripture, to preaching and to teaching. 14Do not neglect your gift, which was given you through a prophetic message when the body of elders laid their hands on you.

15Be diligent in these matters; give yourself wholly to them, so that everyone may see your progress. 16Watch your life and doctrine closely. Persevere in them, because if you do, you will save both yourself and your hearers.

I was wondering what the reference to prophecy means in this passage:

18 Timothy, my son, I give you this instruction in keeping with the prophecies once made about you, so that by following them you may fight the good fight,
19holding on to faith and a good conscience.

Thanks