Charles H. Spurgeon on Psalms 141:5

Yet my prayer also shall be in their calamities. That is, if ever they who are my reprovers fall into calamity, though they may think they provoked me so by reproving me, that they have lost my love, and have cast themselves out of my prayers, or that I will never speak well of them or for them again; yet I will pray for them with all my heart, as their matter shall require. I will pray for them when they have most need of prayer, even "in their calamities." Some heighten the sense thus, —The more they sharpen their reproof, the more I think myself bound to pray for them. It shows an excellent spirit, not to be hindered from doing good to others by anything they do or speak against us, nor by their sharpest (though perhaps mistaken) reproofs of us. Thus it was that that good man Job "prayed for his friends", who had spoken much against him, and not only reproved him without cause, but reproached him without charity. —Joseph Caryl.