'Instructions' in the Bible

When Jesus had finished giving instructions to His twelve disciples, He departed from there to teach and preach in their cities.

And they went out and preached everywhere, while the Lord worked with them, and confirmed the word by the signs that followed.][And they promptly reported all these instructions to Peter and his companions. And after that, Jesus Himself sent out through them from east to west the sacred and imperishable proclamation of eternal salvation.]

But to the married I give instructions, not I, but the Lord, that the wife should not leave her husband

Aristarchus, my fellow prisoner, sends you his greetings; and also Barnabas’s cousin Mark (about whom you received instructions; if he comes to you, welcome him);