Luke 3:5-6
every ravine shall be filled, and every mountain and hill shall be made level; and the crooked ways shall be made straight; and the rough ways shall be made smooth;
Romans 14:13
Let us, therefore, no longer judge one another: but rather decide to put no stumbling-block or snare in your brother's way.
1 Corinthians 1:23
but we preach Christ crucified; to the Jews, indeed, a stumbling-block, and to the Greeks, foolishness:
1 Corinthians 8:9
But take heed, lest, by any means, this right of yours become a stumbling-block to those who are weak.
1 Corinthians 8:13
For which reason, if meat cause my brother to fall, I will never eat meat, lest I cause my brother to fall.
1 Corinthians 10:32-33
Give no occasion for stumbling, either to the Jews, or to the Greeks, or to the church of God;
2 Corinthians 6:3
for we put no stumbling-block in any man's way, in order that this ministry may not be blamed;
Hebrews 12:13
and make straight paths for your feet, lest that which is lame be turned aside; but rather let it be restored to health.