Sirach 27:26-30
{27:26} In the sight of your eyes, he will sweeten his mouth, and he will admire your talk. But at the very end, he will pervert his mouth, and he will offer a scandal from your own words.
{27:27} I have hated many things, but I have not done as he has done, and the Lord will hate him.
{27:28} Whoever throws a stone straight up will find that it falls on his own head. And a deceitful wound will return to wound the deceitful.
{27:29} And whoever digs a pit will fall into it. And whoever positions a stone against his neighbor will stumble over it. And whoever lays a trap for another will perish by it.
{27:30} Whoever sets in motion a wicked plan will find that it rolls back over him, and he will not know from which direction it will arrive.
Sirach 27:21-25
{27:21} And like someone releasing a bird from his hand, so have you abandoned your neighbor, and you will not obtain him again.
{27:22} You should no longer seek him, for he is now far away; he has fled like a roe-deer from a snare. For his soul has been wounded.
{27:23} You will no longer be able to bind his wound. For there may be a reconciliation from cursing.
{27:24} But to disclose the secrets of a friend is the hopeless act of an unhappy soul.
{27:25} One who winks with the eye fabricates iniquity, and no one will cast him aside.