Midrasch zu Schemot 37:26

It is written: And they shall make an ark of acacia-wood (Exod. 25:10). R. Simeon the son of Yohai said: There are three crowns, the crown of Torah, of priesthood, and of kingship. How do we know about the crown of Torah? It is written concerning the ark: And thou shalt overlay it with pure gold (ibid., v. 11); we know about the crown of priesthood because it is written concerning the altar: A crown of gold (Exod. 37:26); and we know about the crown of kingship from the fact that it is written concerning the table: And made thereto a crown of gold (ibid., v. 11). Why is the word (in the preceding verse) written as zar (“stranger”) but read as zer (“crown”)? To teach us that if a man is worthy, it is his crown of gold, but if he is unworthy, he is to be considered a stranger among you.