Psalm 13:5 New English Translation

⁵But I^[a] trust in your faithfulness.
May I rejoice because of your deliverance.^[b]

Psalm 13:5 tn The grammatical construction used here (conjunction with independent pronoun) highlights the contrast between the psalmist’s defeated condition envisioned in v. 4 and confident attitude he displays in v. 5.
Psalm 13:5 tn Heb “may my heart rejoice in your deliverance.” The verb form is jussive. Having expressed his trust in God’s faithful character and promises, the psalmist prays that his confidence will prove to be well-placed. “Heart” is used here of the seat of the emotions.

New English Translation (NET)