Double, double, toile and trouble; / Fire burne, and Cauldron bubble.

A traditional and popular gift, ang pow is given at a house warming, during the tea ceremony to a bridal couple, at a farewell, on a birthday, in return for a favor or a donation, and on other occasions. A symbolic ang pow is given to a prospective client by a coffin maker upon the former exiting his premises, regardless of any transaction.

An occultation of a star by the moon provides two sharply defined observable phenomena: the disappearance of a star behind the disc of the moon (called its immersion), and its subsequent reappearance (or emersion).

He will give the devil his due.