Be mindful of our actions in this life.

This hadith was narrated by Abu Hurairah, who reported that the Prophet Muhammad said that the Hour of Judgement will not come until wealth is abundant and tribulations appear, as well as an increase in killing. When asked what Harj was, he replied three times "Killing, killing, killing". This hadith teaches us that before the Day of Judgement comes there will be a time where wealth is plentiful but also a time where there are many tribulations and much violence. It serves as a reminder to us to be mindful of our actions in this life so we can prepare for the next life.