Matthew Poole and continuators on 2 Samuel 19:24

24 ¶ And Mephibosheth the son of Saul came down to meet the king, and had neither dressed his feet , nor trimmed his beard , nor washed his cloathes , from the day the king departed, until the day he came again in peace.

i. e. The Grandson, 2 Sam. 6. 3, 6.

By cutting his Nails, and by washing his Feet, which was usual in hot Climates, and very refreshing; and therefore now neglected, as becoming a Mourner.

But suffered it to grow very long, and disorderly, as was usual with many persons in a forlorn, or mournful State.

His Linnen Clothes. This and the former were signs, that he was a true and obstinate Mourner, that lay'd aside his usual Refreshments: and they are here mentioned as Evidences of the Falshood of Ziba's former Relation concerning him, Chap. 16. 3.