"The servants of Christ are not to treat their health indifferently. Let no one labor to the point of exhaustion, thereby disqualifying himself for future effort. Do not try to crowd into one day the work of two. At the end, those who work carefully and wisely will be found to have accomplished as much as those who so expend their physical and mental strength that they have no deposit from which to draw in time of need. GW 244.1"
"What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own? For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God’s."
The EGW passage directly relates to the principle of glorifying God in your body by taking care of your health and not overworking yourself. It amplifies the idea that our bodies are temples and should be treated with respect.
"God's work is world-wide; it calls for every jot and tittle of the ability and power that we have. There is danger that His workers will abuse their powers as they see that the field is ripe for the harvest; but the Lord does not require this. After His servants have done their best, they may say, The harvest truly is great, and the laborers are few; but God “knoweth our frame; He remembereth that we are dust.” [ Psalm 103:14 .] GW 244.2"
"For he knoweth our frame; he remembereth that we are dust."
Ellen White directly references Psalms 103:14 in this passage.