"I heard the Messenger of Allah ﷺ say: 'The best of remembrance is La ilaha illallah (None has the right to be worshipped but Allah), and the best of supplication is Al-Hamdu Lillah (praise is to Allah).'"  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ أَفْضَلُ الذِّكْرِ لاَ إِلَهَ إِلاَّ اللَّهُ وَأَفْضَلُ الدُّعَاءِ الْحَمْدُ لِلَّهِ  

the Messenger of Allah ﷺ told them: "One of the slaves of Allah said: 'Ya Rabb! Lakal-hamdu kama yanbagi li-jalali Wajhika wa li 'azima sultanika (O Lord, to You is praise as befits the Glory of Your Face and the greatness of Your Might.)' The angels were uncertain and did not know how to write this down, so they ascended to heaven and said: 'O our Lord, Your slave has said a word that we do not know how to write down.' Allah said - and He knows best what His slave said - 'What did My slave say?' They said: 'O Lord, he said "Ya Rabb! Lakal-hamdu kama yanbagi li-jalali Wajhika wa li'azima sultanika (O Lord, to You is praise as befits the Glory of Your Face and the greatness of your Might).'" Allah said to them: 'Write it down as My slave said it, until he meets Me and I shall reward him for it.'"  

أَنَّ رَسُولَ اللَّهِ ﷺ حَدَّثَهُمْ أَنَّ عَبْدًا مِنْ عِبَادِ اللَّهِ قَالَ يَا رَبِّ لَكَ الْحَمْدُ كَمَا يَنْبَغِي لِجَلاَلِ وَجْهِكَ وَلِعَظِيمِ سُلْطَانِكَ فَعَضَّلَتْ بِالْمَلَكَيْنِ فَلَمْ يَدْرِيَا كَيْفَ يَكْتُبَانِهَا فَصَعِدَا إِلَى السَّمَاءِ وَقَالاَ يَا رَبَّنَا إِنَّ عَبْدَكَ قَدْ قَالَ مَقَالَةً لاَ نَدْرِي كَيْفَ نَكْتُبُهَا قَالَ اللَّهُ ﷻ وَهُوَ أَعْلَمُ بِمَا قَالَ عَبْدُهُ مَاذَا قَالَ عَبْدِي قَالاَ يَا رَبِّ إِنَّهُ قَالَ يَا رَبِّ لَكَ الْحَمْدُ كَمَا يَنْبَغِي لِجَلاَلِ وَجْهِكَ وَعَظِيمِ سُلْطَانِكَ فَقَالَ اللَّهُ ﷻ لَهُمَا اكْتُبَاهَا كَمَا قَالَ عَبْدِي حَتَّى يَلْقَانِي فَأَجْزِيَهُ بِهَا  

his father said: "I prayed with the Prophet ﷺ and a man said: 'Alhamdu lillahi hamdan kathiran tayyiban mubarakan fihi (Praise is to Allah, much, good and blessed praise).' When the Prophet ﷺ finished praying, he said: 'Who said that?' The man said: 'It was me, but I did not mean anything but good.' He said: 'The gates of heaven were opened because of it and nothing prevented it from reaching the Throne.'"  

صَلَّيْتُ مَعَ النَّبِيِّ ﷺ فَقَالَ رَجُلٌ الْحَمْدُ لِلَّهِ حَمْدًا كَثِيرًا طَيِّبًا مُبَارَكًا فِيهِ فَلَمَّا صَلَّى النَّبِيُّ ﷺ قَالَ مَنْ ذَا الَّذِي قَالَ هَذَا قَالَ الرَّجُلُ أَنَا وَمَا أَرَدْتُ إِلاَّ الْخَيْرَ فَقَالَ لَقَدْ فُتِحَتْ لَهَا أَبْوَابُ السَّمَاءِ فَمَا نَهْنَهَهَا شَىْءٌ دُونَ الْعَرْشِ  

"When the Messenger of Allah ﷺ saw something he liked, he would say: 'Al-hamdu lillahil-ladhi bi ni'matihi tatimmus-salihat (Praise is to Allah by Whose grace good deeds are completed).' And if he saw something that he disliked, he would say: 'Al-hamdu lillahi 'ala kulli hal (Praise is to Allah in all circumstances).'"  

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا رَأَى مَا يُحِبُّ قَالَ الْحَمْدُ لِلَّهِ الَّذِي بِنِعْمَتِهِ تَتِمُّ الصَّالِحَاتُ وَإِذَا رَأَى مَا يَكْرَهُ قَالَ الْحَمْدُ لِلَّهِ عَلَى كُلِّ حَالٍ  

the Prophet ﷺ used to say: "Al-hamdu lillahi 'ala kulli hal. Rabbi a'udhu bika min hali ahlin-nar (Praise is to Allah in all circumstances, O Allah, I seek refuge with You from the situation of the people of Hell)."  

أَنَّ النَّبِيَّ ﷺ كَانَ يَقُولُ الْحَمْدُ لِلَّهِ عَلَى كُلِّ حَالٍ رَبِّ أَعُوذُ بِكَ مِنْ حَالِ أَهْلِ النَّارِ  

the Messenger of Allah ﷺ said: 'Allah does not bestow a blessing upon any slave and he says: 'Al-hamdu Lillah (praise is to Allah),' except that what he gives (the praise) is better than what he received (the blessing)."  

قَالَ رَسُولُ اللَّهِ ﷺ مَا أَنْعَمَ اللَّهُ عَلَى عَبْدٍ نِعْمَةً فَقَالَ الْحَمْدُ لِلَّهِ إِلاَّ كَانَ الَّذِي أَعْطَاهُ أَفْضَلَ مِمَّا أَخَذَ