'Stumbling blocks' in the Bible

The Son of Man will send forth His angels, and they will gather out of His kingdom all stumbling blocks, and those who commit lawlessness,

“Woe to the world because of its stumbling blocks! For it is inevitable that stumbling blocks come; but woe to that man through whom the stumbling block comes!

He said to His disciples, “It is inevitable that stumbling blocks come, but woe to him through whom they come!