Psalms 141:5-6 KJV
Let the righteous smite me; it shall be a kindness: and let him reprove me; it shall be an excellent oil, which shall not break my head: for yet my prayer also shall be in their calamities.
When their judges are overthrown in stony places, they shall hear my words; for they are sweet.
David not only says that he welcomes the "smiting" of the righteous and their reproofs but says
It will be an excellent oil.
He will receive it as it is meant, to be an ointment to aide him in his spiritual infirmities.
It will not break his head.
He knows these reproofs will not destroy him but rather minister to him.
And then he says that when those who have reproved him go through any calamity, for surely all men go through calamities and experience times when we are overthrown, he will
Pray for them.
Rather than being bitter and upset, rather than being vengeful and secretly rejoicing in their difficulties, he will lift them up in prayer.
Speak sweet words to them.
They will hear them because he has not turned himself from them. He does not avoid them. And in their time of distress he will be among those that speaking gently, kindly and sweetly to them.