Seek a fable about the weight of life

There is a fable that says:

A Hebrew businessman asked his camel to carry heavy loads. He showed off to his companions and said, "Dude, look how capable my camel is!" " "The companion said," Dude, your camel is very capable, but it has carried it to the limit. Look at its legs shaking! "I can assure you that one more straw will be enough to crush the poor guy to death." The businessman was unconvinced and said, "Dear buddy, you look down on my camel. You see it is so powerful, I don't believe that a straw can crush it to death. " The companion said, "Then witness it." The companion picked up a straw and gently put it on the camel's back. The tired camel really collapsed.