Hadith: Purity is half of faith, al-hamdulillāh (praise be to Allah) fills the Scale, and subhān Allah wa al-hamdulillāh (glory and praise be to Allah) fills what is between the heavens and the earth

عن أبي مالكٍ الأشعريِّ رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم:
«الطُّهُورُ شَطْرُ الْإِيمَانِ، وَالْحَمْدُ لِلهِ تَمْلَأُ الْمِيزَانَ، وَسُبْحَانَ اللهِ وَالْحَمْدُ لِلهِ تَمْلَآنِ -أَوْ تَمْلَأُ- مَا بَيْنَ السَّمَاوَاتِ وَالْأَرْضِ، وَالصَّلَاةُ نُورٌ، وَالصَّدَقَةُ بُرْهَانٌ، وَالصَّبْرُ ضِيَاءٌ، وَالْقُرْآنُ حُجَّةٌ لَكَ أَوْ عَلَيْكَ، كُلُّ النَّاسِ يَغْدُو، فَبَايِعٌ نَفْسَهُ فَمُعْتِقُهَا أَوْ مُوبِقُهَا».
[صحيح] - [رواه مسلم] - [صحيح مسلم: 223]

Abu Mālik al-Ash‘ari (may Allah be pleased with him) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) said:
"Purity is half of faith, al-hamdulillāh (praise be to Allah) fills the Scale, and subhān Allah wa al-hamdulillāh (glory and praise be to Allah) fills what is between the heavens and the earth. Prayer is light, charity is proof, patience is radiance, and the Qur’an is an argument either for you or against you. Every person goes out in the morning and sells his soul; he either saves it from doom or throws it into destruction."
[Authentic hadith] - [Narrated by Muslim] - [Sahih Muslim - 223]

Explanation

The Prophet (may Allah's peace and blessings be upon him) says that outward purification is attained by ablution and washing up, and it is required for prayer. And saying "al-hamdulillāh" fills the Scale. This is to praise Allah and ascribe the attributes of perfection to Him. This will be weighed on the Day of Judgment and fill the Scale of deeds. Saying "subhān Allah wa al-hamdulillāh" - which exalts Allah far above all deficiencies and ascribes to Him the complete perfection that befits His majesty, along with loving and extolling Him - fills what is between the heavens and the earth. "Prayer is light" for a person within his heart, on his face, in his grave, and on the Day of Judgment. "Charity is proof" and evidence for the sincerity of a believer's faith and it sets him apart from the hypocrite, who refrains from giving charity because he does not believe in the reward promised in return for it. "Patience is radiance," by refraining from exasperation and indignation, is radiance, which is light that comes with heat and burning, like the light of the sun. This is because patience is difficult and requires self-struggle and restraining oneself from one's desires. So, a patient person continues to have light and adhere to guidance and the right path. Patience is shown in observing Allah's commands, avoiding His prohibitions, and enduring afflictions and different forms of hardships in this world. And "the Qur’an is proof either for you," by reciting and acting upon it, or "against you," for abandoning it, without application or recitation. Then, the Prophet (may Allah's peace and blessings be upon him) mentioned that all people work and go about, and they get up from their sleep and go out for their different activities. Some of them hold onto obedience to Allah and thus save themselves from Hellfire. And some others deviate from that and commit sins, which ruin them by leading them to Hellfire.