Have you ever seen something wrong but stayed silent, hoping it wasn't your problem? Doeg's position by Saul's servants is a powerful picture of this.
Doeg the Edomite is in a precarious spot. He's 'standing by the servants of Saul,' meaning he's in the king's inner circle, privy to information, and likely expected to be loyal. Yet, his role is passive – he's an observer, not an actor.
This isn't about being physically present; it's about the moral posture of observation. Doeg sees David coming to Nob and hears Ahimelech interacting with him. He could have ignored it, or perhaps felt conflicted. But his 'standing by' eventually leads to his active betrayal.