What is the ruling on repeating the greeting of peace (Salam) upon entering a place where there is a person or people several times, or is it sufficient to give the Salam once for the first entry only?

It is recommended to repeat the greeting of "Salam" to someone you meet multiple times, for instance, if they enter and then immediately leave, or if a tree or similar object came between them. This is supported by the hadith of the one who prayed incorrectly, and the hadith: "If one of you meets his brother, he should greet him with Salam. Then, if a tree, a wall, or a stone comes between them, and he meets him again, he should greet him with Salam."