"... The psalmist repeatedly returns to his 'reproaches' throughout the lament section. He is shamed and dishonored and bears reproach because of his identification with Yahweh (note especially verses 6-9). So, he confesses that Yahweh 'knows' his reproach and his enemies as well as the heartbreak and despair that he consequently finds himself in (verse 20). Verse 21 [68:22 LXX], alluded to in John 19:28-29, illustrates the grievous nature of his shame and persecution at the hands of his enemies. The psalmist's 'throat is parched' from constantly crying out to Yahweh in prayer (verse 3) and his tearful fasting has become his reproach, but his hunger and thirst is met not with pity from friends but with his foes' hostile offer of sour wine to drink and poison for food (verse 21). His enemies have et his table with nothing but bitterness and reproach, and so he prays in verse 22 that their 'table' would be turned on them, such that those offering him bitter food and drink might taste divine indignation in return. However, like Psalm 22, Psalm 69 moves from lament to praise as God's salvation comes into focus (29-36) ..."