Albert Barnes Commentary Psalms 30:11

"Thou hast turned for me my mourning into dancing; Thou hast loosed my sackcloth, and girded me with gladness;" — Psalms 30:11 (ASV)

You have turned for me – In my behalf. That is, God had heard his prayer; He had brought his troubles to an end; He had caused his sorrows to be succeeded by corresponding joy.

My mourning into dancing – Joy, exultation, every expression of rejoicing, had been made to succeed his deep sorrows. . It was this which he commemorated at the dedication of his house; this joy succeeding scenes of sorrow that he now called to remembrance as he entered the place which he had reared for a permanent abode. The contrast of his circumstances now – in a palace, with every comfort of plenty and peace around him – with his former circumstances which had been so sad, made it proper for him thus to celebrate the goodness of God.

You have put off my sackcloth – That which I wore, or had girded around me, as an emblem of sorrow, or in the time of my mourning. (See the notes on Isaiah 3:24; Job 16:15).

And girded me with gladness – Instead of a girdle of sackcloth he had been clothed in a festive dress, or with such a dress – girded with an elegant girdle – as was worn on joyous and festive occasions. (See the notes on Matthew 5:38-41).