(the clerk of Al-Mughira bin Shuʿba) Muawiya wrote to Al-Mughira: "Write to me a narration you have heard from Messenger of Allah ﷺ." So Al-Mughira wrote to him, "I heard him saying the following after each prayer: 'La ilaha illal-lahu wahdahu la sharika lahu, lahu-l-mulk wa lahuI-hamd, wa huwa 'ala kulli Shai-in qadir.' He also used to forbid idle talk, asking too many questions (in religion), wasting money, preventing what should be given, and asking others for something (except in great need), being undutiful to mothers, and burying one's little daughters (alive).  

أَخْبَرَنَا غَيْرُ وَاحِدٍ مِنْهُمْ مُغِيرَةُ وَفُلاَنٌ وَرَجُلٌ ثَالِثٌ أَيْضًا عَنِ الشَّعْبِيِّ عَنْ وَرَّادٍ كَاتِبِ الْمُغِيرَةِ بْنِ شُعْبَةَ أَنَّ مُعَاوِيَةَ كَتَبَ إِلَى الْمُغِيرَةِ أَنِ اكْتُبْ إِلَىَّ بِحَدِيثٍ سَمِعْتَهُ مِنْ رَسُولِ اللَّهِ ﷺ قَالَ فَكَتَبَ إِلَيْهِ الْمُغِيرَةُ أَنِّي سَمِعْتُهُ يَقُولُ عِنْدَ انْصِرَافِهِ مِنَ الصَّلاَةِ لاَ إِلَهَ إِلاَّ اللَّهُ وَحْدَهُ لاَ شَرِيكَ لَهُ لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ وَهْوَ عَلَى كُلِّ شَىْءٍ قَدِيرٌ ثَلاَثَ مَرَّاتٍ قَالَ وَكَانَ يَنْهَى عَنْ قِيلَ وَقَالَ وَكَثْرَةِ السُّؤَالِ وَإِضَاعَةِ الْمَالِ وَمَنْعٍ وَهَاتِ وَعُقُوقِ الأُمَّهَاتِ وَوَأْدِ الْبَنَاتِ وَعَنْ هُشَيْمٍ أَخْبَرَنَا عَبْدُ الْمَلِكِ بْنُ عُمَيْرٍ قَالَ سَمِعْتُ وَرَّادًا يُحَدِّثُ هَذَا الْحَدِيثَ عَنِ الْمُغِيرَةِ عَنِ النَّبِيِّ ﷺ  

Messenger of Allah ﷺ said, "Whoever can guarantee (the chastity of) what is between his two jaw-bones and what is between his two legs (i.e. his tongue and his private parts), I guarantee Paradise for him."  

عَنْ رَسُولِ اللَّهِ ﷺ قَالَ: «مَنْ يَضْمَنْ لِي مَا بَيْنَ لَحْيَيْهِ وَمَا بَيْنَ رِجْلَيْهِ أَضْمَنْ لَهُ الْجَنَّةَ۔»