Psalm 55:17 describes crying out evening, morning, and noon — persistent prayer like the all-day cry.

Psalm 56:1 also cries for mercy 'all day long' due to enemies — same phrase and plea.

Psalm 88:9 calls to the Lord every day — a parallel of daily persistent prayer in distress.

Psalm 4:1 also pleads 'have mercy on me and hear my prayer' — directly paralleling the cry for mercy in Psalm 86:3.

Psalm 88:1 also cries out 'day and night' to God — matching the psalmist's 'all day long' cry for mercy.

Psalm 57:1 pleads for mercy and takes refuge — a similar cry for help.

Psalm 3:4 also describes calling out to the Lord — but adds that God answers, complementing the psalmist's cry for mercy.

Psalm 25:5 also uses 'all day long' for hope in God — mirroring the psalmist's continual cry for mercy.

Luke 11:8-13 teaches persistence in prayer — echoing the psalmist's all-day crying.

Luke 18:7 mentions God's chosen who cry out day and night — directly parallel to the all-day cry.

In 1 Kings 8:28, Solomon similarly pleads for God to hear his cry for mercy — echoing the psalmist's daily cry.

Daniel 6:10 shows Daniel praying regularly three times a day — a pattern of persistent prayer similar to the psalmist's continual cry.

Luke 2:37 shows Anna worshiping night and day — a NT example of persistent prayer.

Luke 18:1 teaches to 'always pray and not give up' — echoing the psalmist's continual cry for mercy.

Ephesians 6:18 exhorts constant prayer in the Spirit — similar to the psalmist's persistent crying.