"And for whoever produces it, there shall be a camel's load" of food, "and I am its guarantor," meaning: a surety.
﴿وَلِمَنْ جَاءَ بِهِ حِمْلُ بَعِيرٍ﴾ مِنَ الطَّعَامِ ﴿وَأَنَا بِهِ زَعِيمٌ﴾ كَفِيل.