כִּי־ה֖וּא יָדַ֣ע יִצְרֵ֑נוּ זָ֝כ֗וּר כִּי־עָפָ֥ר אֲנָֽחְנוּ׃
For He knoweth our frame; He remembereth that we are dust.
Rashi on Psalms
He remembers that we are dust He remembers and has not forgotten that we are dust and He knows that: “As for manhis days, etc.”