Shaykh Ahmad an-Najmee (rahimahullah) said:
In the hadeeth of Anas (radiaAllaahu anhu):
“If Allah wills good for His slave, He hastens his punishment in this world, and if He wills bad for His slave, He withholds from him (the punishment for) his sin, until He requites him for it on the Day of Resurrection.” [Tirmidhi, Authenticated by Al-Albaani]
This hadeeth informs [us] that a servant [of Allaah] is afflicted with adversities and continually [tested] with calamities, so he thinks this is [because] Allah dislikes him, whilst this is not the case; rather it maybe that Allah loves him and wants to test him with trials, so that he appears on the day of resurrection and [the trials he went through in the worldly life becomes a means of] reducing [his] sins.
“Ash-Sharh al-Moojaz al-Mumahhad li Tawheed al-Khāliq al-Mumajjad alladhi allafahu Shaikhul-Islam Muhammad” Page 154