Excellence of Greeting the Acquaintance Repeatedly

Abu Umamah Sudaiy bin `Ajlan Al-Bahili (May Allah be pleased with him) reported: The Messenger of Allah (ﷺ) said, "The person nearest to Allah is one who is the first to offer greeting." The narration in At-Tirmidhi is: The Messenger of Allah (ﷺ) was asked: "O Messenger of Allah! When two persons meet, who should greet the other first?'' The Messenger of Allah (ﷺ) said, "The person nearest to Allah (i.e., one who is more obedient and therefore closer to Allah will say: As-Salam first."

Abu Hurairah (May Allah be pleased with him)reported in the Hadith in respect of the person who was at fault in performing his Salat (prayer): He came to the Prophet (PBUH) and greeted him. The Prophet (PBUH) responded to the greeting and said, "Go back and repeat your Salat because you have not performed the Salat (properly)." He again performed Salat as he had prayed before and came to the Prophet (PBUH) and greeted him. The Prophet (PBUH) responded to the greetings (and repeated his words to him). This act of repeating (the Salat and the Salam) was done thrice.

Abu Hurairah (May Allah be pleased with him) reported: Messenger of Allah (PBUH) said, "When one of you meets a brother (in Faith) he should greet him. Then if a tree or a wall or a stone intervenes between them and then he meets him again, he should greet him."