Jami' at-Tirmidhi
Known for its unique approach of grading each hadith and mentioning the scholarly opinions on the legal topic discussed. At-Tirmidhi's grading system (sahih, hasan, da'if) became standard methodology.
Hadith
The Messenger of Allah (ﷺ) said: 'Observe night prayer (qiyam al-layl), for it was the practice of the righteous before you and it is a means of nearness to your Lord.'
The Messenger of Allah (ﷺ) said: 'Nothing will be heavier on the Day of Judgment in the scale of a believer than good character. Allah hates one who is obscene and shameless.'
The Messenger of Allah (ﷺ) said: 'The one who maintains ties of kinship is not the one who reciprocates. Rather, the one who maintains ties of kinship is the one who, when his relatives cut him off, maintains his ties.'
The Messenger of Allah (ﷺ) said: 'If this world were worth the wing of a mosquito to Allah, He would not have given a disbeliever even a sip of water from it.'
The Messenger of Allah (ﷺ) said: 'Richness is not having many possessions. Rather, true richness is the richness of the soul.'
The Messenger of Allah (ﷺ) said: 'Look at the one who is below you and do not look at the one who is above you, for that is more likely to prevent you from belittling the blessings of Allah.'
The Messenger of Allah (ﷺ) said: 'If you were to rely upon Allah with the reliance He is due, you would be given provision like the birds: they go out hungry in the morning and return full in the evening.'
The Messenger of Allah (ﷺ) said: 'Supplication is the essence of worship.'
The Messenger of Allah (ﷺ) said: 'Whoever does not ask Allah, He will be angry with him.'
The Messenger of Allah (ﷺ) said: 'Make use of five before five: your youth before your old age, your health before your sickness, your wealth before your poverty, your free time before you become busy, and your life before your death.'