لَوْ سَاعَدَتْنِي الْأَيَّامُ لَمْ يَرَنِي مُرْتَهِنًا مِيلَهُ الَّذِي رَهَنَا
Had fortune helped me, you would not have seen me accepting his kohl applicator as a pledge.
Law introduces a contrary-to-fact condition: if circumstances had been different, the elder would not have needed security. His point is that his insistence on the pledge arises from hardship, not simply harshness.