وَلَا دِينَ لِمَنْ لَا عَهْدَ لَهُ
Translation: And the one who does not honor a covenant lacks completeness in religious conduct.
Source: al-Bayhaqi
Key vocabulary: دِينَ — religion or religious conduct; عَهْدَ — covenant or commitment; لَهُ — belonging to him / for him.
Brief grammar: وَلَا joins وَ (“and”) to لَا (“no”). In لَا دِينَ and لَا عَهْدَ, the singular indefinite noun takes fatḥah without tanwīn.
A covenant is more than making a verbal promise; it calls for fulfilling a legitimate obligation. Trust and commitment overlap but are not identical: the first concerns safeguarding what is entrusted, while the second requires honoring an agreed responsibility.