[Machine] So he said, "Behold, the saying of falsehood." He continued to repeat it. Ibn Umar reported that the Prophet ﷺ said, "Have I conveyed the message?" Three times.
فَقَالَ: «أَلاَ وَقَوْلُ الزُّورِ». فَمَا زَالَ يُكَرِّرُهَا. وَقَالَ ابْنُ عُمَرَ قَالَ النَّبِيُّ ﷺ: «هَلْ بَلَّغْتُ». ثَلاَثًا.
Whenever the Prophet ﷺ asked permission to enter, he knocked the door thrice with greeting and whenever he spoke a sentence (said a thing) he used to repeat it thrice. (See Hadith No. 261, Vol. 8).
عَنِ النَّبِيِّ ﷺ أَنَّهُ كَانَ إِذَا سَلَّمَ سَلَّمَ ثَلاَثًا وَإِذَا تَكَلَّمَ بِكَلِمَةٍ أَعَادَهَا ثَلاَثًا
Whenever the Prophet ﷺ spoke a sentence (said a thing), he used to repeat it thrice so that the people could understand it properly from him and whenever he asked permission to enter, (he knocked the door) thrice with greeting.
عَنِ النَّبِيِّ ﷺ أَنَّهُ كَانَ إِذَا تَكَلَّمَ بِكَلِمَةٍ أَعَادَهَا ثَلاَثًا حَتَّى تُفْهَمَ عَنْهُ وَإِذَا أَتَى عَلَى قَوْمٍ فَسَلَّمَ عَلَيْهِمْ سَلَّمَ عَلَيْهِمْ ثَلاَثًا
Once Messenger of Allah ﷺ remained behind us in a journey. He joined us while we were performing ablution for the ʿAsr prayer which was over-due. We were just passing wet hands over our feet (not washing them properly) so the Prophet ﷺ addressed us in a loud voice and said twice or thrice, "Save your heels from the fire."
تَخَلَّفَ رَسُولُ اللَّهِ ﷺ فِي سَفَرٍ سَافَرْنَاهُ فَأَدْرَكَنَا وَقَدْ أَرْهَقْنَا الصَّلاَةَ صَلاَةَ الْعَصْرِ وَنَحْنُ نَتَوَضَّأُ فَجَعَلْنَا نَمْسَحُ عَلَى أَرْجُلِنَا فَنَادَى بِأَعْلَى صَوْتِهِ وَيْلٌ لِلأَعْقَابِ مِنَ النَّارِ مَرَّتَيْنِ أَوْ ثَلاَثًا