1 Peter 2:8

a stone of stumbling, and a rock of offense. Those who stumble at the word, are disobedient unbelievers, to which, therefore, they were appointed:

1 John 2:10-11

He who loves his brother, abides in the light, and there is no stumbling block to him.

Treasury of Scripture Knowledge

Summary

Give glory to the LORD your God, before he cause darkness, and before your feet stumble upon the dark mountains, and, while ye look for light, he turn it into the shadow of death, and make it gross darkness.

Bible References

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1 Peter 2:8
a stone of stumbling, and a rock of offense. Those who stumble at the word, are disobedient unbelievers, to which, therefore, they were appointed:
1 John 2:10
He who loves his brother, abides in the light, and there is no stumbling block to him.