I am running my first campaign, Phandelver and Below.  During Cragmaw Castle, the party knocked out and captured a Yegg after clearing the easter half of the castle.  Bond him with  successfully with rope.    The wizard in the party cast Friends on Yegg while bond.  I have Yegg advantage on the save.  Was i wrong for this?  My thinking was in Yeggs mind he was still fighting even though he was tied up.  Thoughts on the uses of the cantrip friends post fight on hostile NPC.  TIA.

The wording of Friends is:

For the duration, you have advantage on all Charisma checks directed at one creature of your choice that isn't hostile toward you. When the spell ends, the creature realizes that you used magic to influence its mood and becomes hostile toward you. A creature prone to violence might attack you. Another creature might seek retribution in other ways (at the DM's discretion), depending on the nature of your interaction with it.

Emphasis mine.

Friends only works on neutral ones, and it gives it away at the end by making them Hostile anyway!

Forgot, using 2024 rules for this.

Quote from MoesRSSS >>

Forgot, using 2024 rules for this.

If my google-fu has found the right one:

You magically emanate a sense of friendship toward one creature you can see within range. The target must succeed on a Wisdom saving throw or have the Charmed condition for the duration. The target succeeds automatically if it isn't a Humanoid, if you're fighting it, or if you have cast this spell on it within the past 24 hours.
The spell ends early if the target takes damage or if you make an attack roll, deal damage, or force anyone to make a saving throw. When the spell ends, the target knows it was Charmed by you.

I would say that juse because it has been captured doesn't mean you're not fighting it. Wow but this is an ambisguous way to say it... All you need is a pacifist player who insists that they aren't "fighting" anything... If this is the right one, one more reason I'm sticking to 5e!