David
Psalm 80:5ESV·traditional attribution

You have fed them with the bread of tears and given them tears to drink in full measure.

John Calvin Reformed @genevareformer

PSALM 80 This is a sorrowful prayer, in which the faithful beseech God that he would be graciously pleased to succor his afflicted Church. To excite him the more readily to grant them relief in their distressing circumstances, they compare these circumstances with the condition of the Church in her beginnings, when the Divine favor was conspicuously manifested towards her. To the chief musician upon Sosannim Eduth.

Commenting on Psalm 80:1-19

C.H. Spurgeon Reformed Baptist @princeofpreachers

"Thou feedest them with the bread of tears." Their meat is seasoned with brine distilled from weeping eyes. Their meals, which were once such pleasant seasons of social merriment, are now like funeral feasts to which each man contributes his bitter morsel. Thy people ate bread of wheat before, but now they receive from thine own hand no better diet than bread of tears.

Matthew Henry Presbyterian @wholebiblehenry

The psalmist here, in the name of the church, applies to God by prayer, with reference to the present afflicted state of Israel. I. He entreats God's favour for them (Psa 80:1, Psa 80:2); that is all in all to the sanctuary when it is desolate, and is to be sought in the first place. Observe, 1.

Commenting on Psalm 80:1-7