Matthew 2:4συναγαγὼν
And when he had assembled all the chief priests and scribes of the people, he asked them where the Christ was to be born.
Mark 2:2συνήχθησαν
they gathered in such large numbers that there was no more room, not even outside the door, as Jesus spoke the word to them.
Luke 11:23συνάγων
He who is not with Me is against Me, and he who does not gather with Me scatters.
John 4:36συνάγει
Already the reaper draws his wages and gathers a crop for eternal life, so that the sower and the reaper may rejoice together.
Acts 4:27συνήχθησαν
In fact, this is the very city where Herod and Pontius Pilate conspired with the Gentiles and the people of Israel against Your holy servant Jesus, whom You anointed.
Revelation 16:14συναγαγεῖν
These are demonic spirits that perform signs and go out to all the kings of the earth, to assemble them for battle on the great day of God the Almighty.

Abbott-Smith

συν-άγω
[in LXX chiefly for אָסַף, also for קָבַץ, etc. (cf. Kennedy, Sources, 128) ;]
to gather or bring together: of things, Jhn.6:12-13; before εἰς, Mat.3:12, al.; ἐκεῖ, Luk.12:18; ποῦ, Luk.12:17; συναγαγὼν πάντα (sc. εἰς ἀργύριον; see Field, Notes, 68, MM, xxiv), having sold off all: Luk.15:13; of persons, Jhn.11:52; esp. of assemblies, Mat.2:4, Jhn.11:47, Act.14:27, al. Pass., to be gathered or come together: Mat.22:41, Mrk.2:2, Luk.22:66, al.; before ἐπί Mrk.5:21, Act.4:27; πρός, Mat.13:2, Mrk.4:1, al.; εἰς, Rev.19:17; ἐν, Act.11:26; μετά, Mat.28:12; οὗ, Mat.18:20; ὅπου, Mat.26:57; ἐκεῖ, Jhn.18:2, al.
In late writers (see Kennedy, Sources, 128; cf. Deu.22:2, al.), to receive hospitably, entertain: Mat.25:35, 38 25:43 (cf. ἐπι-συνάγω)
(AS)

Sources: Abbott-Smith’s Manual Greek Lexicon of the New Testament (1922, public domain) and glosses from STEPBible TBESG (CC BY 4.0); STEPBible TAGNT (Greek New Testament, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.