[Machine] I heard the Messenger of Allah ﷺ saying, "If one of you greets (sends blessings upon) someone three times and does not receive a response, then let him return."
سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ إِذَا سَلَّمَ أَحَدُكُمْ ثَلَاثًا فَلَمْ يُجَبْ فَلْيَرْجِعْ