The Messenger of Allah ﷺ said: By his good character a believer will attain the degree of one who prays during the night and fasts during the day. (Using translation from Abū Dāʾūd 4798)
سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ إِنَّ الْمُؤْمِنَ يُدْرِكُ بِحُسْنِ خُلُقِهِ دَرَجَاتِ قَائِمِ اللَّيْلِ صَائِمِ النَّهَارِ