בראשית מ:יג פירוש: רש״י, רשב״ם, ספורנו ורד״ק

ישא פרעה את ראשך PHARAOH SHALL LIFT UP THY HEAD — The words נשא ראש denote to count (cf. Exodus 30:12). When he musters his other servants to wait upon him during the meal he will count you also among them.

ישא פרעה את ראשך, the use of the word ישא here is similar to the use of the same word in Numbers 1,2 שאו את ראש כל עדת ישראל, “count the whole community of Israel, etc.” After three days Pharaoh will again number you among his servants.

As was your previous practice. Before you became an official.