Strong's Concordance G5522

Mar 6:11  And whosoever shall not receive you, nor hear you, when ye depart thence, shake off the dustG5522 under your feet for a testimony against them. Verily I say unto you, It shall be more tolerable for Sodom and Gomorrha in the day of judgment, than for that city.

Rev 18:19  And they cast dustG5522 on their heads, and cried, weeping and wailing, saying, Alas, alas, that great city, wherein were made rich all that had ships in the sea by reason of her costliness! for in one hour is she made desolate.