What ayah or hadith brings you the most comfort during hard times?

Mine is: ﴿ وَٱصۡبِرۡ لِحُكۡمِ رَبِّكَ فَإِنَّكَ بِأَعۡيُنِنَاۖ وَسَبِّحۡ بِحَمۡدِ رَبِّكَ حِينَ تَقُومُ ﴾ (Surah At-Tur 52:48)

Translation: “So be patient for the decision of your Lord, for indeed you are under Our watchful eyes. And glorify the praise of your Lord when you rise.”