Shared ground
Psalm 57:3 presents rescue as something God actively sends. The speaker is not describing self-rescue or luck, but a decisive intervention that comes “from heaven” and results in the speaker being saved. That same action also confronts the pursuer: God “rebukes” the one chasing the speaker, meaning the threat is checked by a higher authority.
The verse slows down at “Selah,” then restates the core confidence with different words: God will “send out” his steadfast love and his truth. The repeated “send” highlights deliberate, timely divine action rather than vague goodwill.
Where interpretation differs
One question is what “rebukes” means in practice. Some read it as God verbally censuring the pursuer (exposing and shaming the attacker). Others read it more broadly as God taking decisive action that stops the pursuit—an effective intervention, not only words.
Another question is how literal “from heaven” is. Some take it as a poetic way of saying God himself will intervene from his realm. Others allow for a more concrete sense—help dispatched from God’s heavenly court (for example, through agents)—while still treating the main point as divine rescue.
A third question is how “steadfast love and truth” relate to the rescue. Some read them as the reason the speaker is confident (God’s loyal character guarantees help). Others read them as also describing the form the help takes (God’s loyal commitment and reliability are what arrive on the scene to protect and preserve).
Why the disagreement exists
The verse uses compact poetic language. Words like “rebuke” can name either a spoken reprimand or an act that brings an enemy’s effort to nothing. “From heaven” can be spatial language, metaphor, or both. And the last line can function either as explanation (God helps because he is loyal and true) or as description (God’s loyal, reliable care is what he sends).
What this passage clearly contributes
Explicitly, the text claims that God will send help from heaven to save the speaker, and that God rebukes the pursuer. It also ties the expected rescue to God’s known qualities: steadfast love and truth. The repetition of “send” and the pause at “Selah” together underscore the certainty and deliberateness of God’s intervention in the face of real threat (Psalm 57:3).