«وَلَسْتُ بِالْمُوجِبِ حَقًّا لِمَنْ / لَا يُوجِبُ الْحَقَّ عَلَى نَفْسِهِ»
I do not impose an obligation for someone who does not acknowledge obligations upon himself.
Awjaba means to make binding. The active participle al-mūjib and the imperfect yūjib produce both a sound pattern and a conceptual parallel.
This is the speaker's uncompromising position, not a universal rule abolishing legal or religious rights. Its immediate context is mutual expectations in companionship, where one party demands much but accepts no responsibility.