وَلاَ تَبْسُطْهَا كُلَّ الْبَسْطِ
(nor overextend it (like a spendthrift)) means, nor be extravagant in spending and giving more than you can afford, or paying more than you earn, lest you become blameworthy and find yourself in severe poverty. If you are a miser, people will blame you and condemn you, and no longer rely on you. When you spend more than you can afford, you will find yourself without anything to spend, so you will be worn out, like an animal that cannot walk, so it becomes weak and incapable. It is described as worn out, which is similar in meaning to exhausted. As Allah says: