Strive for excellence in religious practices without compromising your health or other aspects of life

This hadith speaks to the importance of moderation when it comes to religious practices such as fasting and prayer. The Prophet Muhammad ﷺ advised Abdullah b. Amr that if he fasted continuously and prayed all night, his eyes would become strained and he would lose sight. He then went on to explain that fasting for three days during the month was like fasting for the whole month, suggesting that moderation was more beneficial than excessive worship. The Prophet ﷺ also mentioned David's practice of fasting one day and breaking another, noting that David did not turn back in battle because of his practice - implying that moderate worship can lead to strength in other areas as well. Ultimately, this hadith teaches us the importance of balance when it comes to our religious practices - we should strive for excellence but not at the expense of our health or other aspects of life.