Dipping twice

Hi,

"One reason we dip twice [at the Seder] is:

"We dip once to remember the redemption from Egypt, regarding which it is written [for the Pesach offering brought on the night of the redemption], 'You shall take a hyssop bundle and dip it.'

"The second dip is to remember the exile, which was for the sin of selling Joseph, regarding which it is written, 'They dipped his tunic in blood.'"

(Taamei haMinhagim 524, citing Shelah)

Have a great day,
Mordechai