Adam Clarke on Isaiah 52:5

They that rule over them "They that are lords over them" - For משלו moshelo, singular, in the text, more than a hundred and twenty MSS. (De Rossi says, codices innumeri, "numberless copies") have משליו moshelaiv plural, according to the Masoretical correction in the margin; which shows that the Masoretes often superstitiously retained apparent mistakes in the text, even when they had sufficient evidence to authorize the introduction of the true reading.

Make them to howl "Make their boast of it" - For יהילילו yeheililu, "make them to howl," five MSS., (two ancient), have יהללו yehalelu, "make their boast;" which is confirmed by the Chaldee paraphrast, who renders it משתבחין mishtabbechin. Ulaloo is not only the cry itself, but also the name of the funeral song of the Irish. The Arabs have a cry very much resembling this.