From the KJV 1611 with Strong's Concordance
{pet'-ra}
Feminine of the same as G4074; a (mass of) rock (literally or figuratively).
rock Matthew 7:24, 25; 16:18; 27:60. Mark 15:46. Luke 6:48; 8:6, 13. Romans 9:33. 1 Corinthians 10:4. 1 Peter 2:8.
rocks Matthew 27:51. Revelation 6:15, 16.
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