Meaning
To repay faithfully the one whose bread one has eaten.
Literally: to discharge the debt of one's salt
See it in the verse
Namak ka haq ada karna in Iqbal’s couplets
Ho mera kaam ghareebon ki himayat karna
Dard-mandon se zaeefon se mohabbat karna
Dard-mandon se zaeefon se mohabbat karna
Let my work be to defend the poor — to love the suffering and the weak.
Justice · Humility · Love
Ho halqa-e-yaaran to bresham ki tarah narm
Razm-e-haq-o-baatil ho to faulad hai momin
Razm-e-haq-o-baatil ho to faulad hai momin
Among friends, the man of faith is soft as silk; in the battle of truth against falsehood, he is steel.
Courage · Selfhood · Justice
Aaeen-e-jawan-mardan haq-goi-o-be-baaki
Allah ke sheron ko aati nahin rubaahi
Allah ke sheron ko aati nahin rubaahi
The code of the brave is to speak the truth and to be fearless — the lions of God do not know the ways of the fox.
Courage · Justice · Selfhood