Adhering to contracts with steadfast fulfillment
Nahj al-Balāgha|Volume 1|Book 3|Chapter 155
١٥٥. وَقَالَ (عليه السلام): اعْتَصِمُوا بِالذِّمَمِ فِي أَوْتَادِهَا.
155. Amīr al-mu’minīn, peace be upon him, said: Adhere to contracts and entrust their fulfilment to steadfast persons.