Commentaries:
Robertson's Word Pictures (NT)
The place was shaken (esaleuqh o topov). By an earthquake most likely as in Acts 16:26, but none the less a token of God's presence and power (Psalms 114:7; Isaiah 2:19, Isaiah 2:21; Hebrews 12:26 f.).
Were gathered together (hsan sunhgmenoi). Periphrastic past perfect passive of sunagw.
They spake (elaloun). Imperfect active indicative, began to speak, after being filled (eplhsqhsan, aorist passive indicative) with the Holy Spirit. Luke uses the very words of the prayer in verse Acts 4:29 to describe their conduct.
Other Robertson's Word Pictures (NT) entries containing Acts 4:31:
Acts 4:8
Acts 4:13
Acts 4:33
Acts 5:3
Acts 8:17
Acts 12:12
Acts 13:52
Acts 16:26
Acts 17:13
Acts 20:7
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