What is the meaning of the Hadith: "Cleanse yourselves from urine, for indeed, most of the torment of the grave is due to it"?

It is stated in the Hadith that most of the torment of the grave comes from not safeguarding oneself and being meticulous about urine. Safeguarding oneself from it is done by urinating in a soft place or a hole that absorbs the urine, so that no splashes scatter onto the body. If any of it gets on the body, it must be washed.