Observe Itikaf, Strive to stay away from any kind of sinful behavior or activities .

This hadith teaches us that abstaining from sin is a great deed in the eyes of Allah and can be rewarded just like doing all kinds of good deeds. The Prophet Muhammad said this to encourage people to observe Itikaf, which is a period of time spent in seclusion and prayer in the mosque. During this time, one should strive to stay away from any kind of sinful behavior or activities. By doing so, one can expect to receive a great reward from Allah for their efforts. This hadith also serves as an important reminder that even small acts of piety can have big rewards in the hereafter.