hadith
4849
۞
Imam Ali (AS) said, If Allah, the Glorified, had not made a promise [to punish those who are disobedient], it would have still been obligatory not to disobey Him out of gratitude for His blessings.
الإمامُ عليٌّ (عَلَيهِ الّسَلامُ) : لَوْ لَمْ يَتَواعَدِ اللّهُ سُبْحانَهُ لَوَجَبَ أنْ لا يُعْصى شُكْراً لِنِعْمَتِهِ