Matthew 5:4πενθοῦντες
Blessed are those who mourn, for they will be comforted.
Mark 16:10πενθοῦσιν
She went and told those who had been with Him, who were mourning and weeping.
Luke 6:25πενθήσετε
Woe to you who are well fed now, for you will hunger. Woe to you who laugh now, for you will mourn and weep.
1 Corinthians 5:2ἐπενθήσατε
And you are proud! Shouldn’t you rather have been stricken with grief and have removed from your fellowship the man who did this?
2 Corinthians 12:21πενθήσω
I am afraid that when I come again, my God will humble me before you, and I will be grieved over many who have sinned earlier and have not repented of their acts of impurity, sexual immorality, and debauchery.
Revelation 18:15πενθοῦντες
The merchants who sold these things and gained their wealth from her will stand at a distance, in fear of her torment. They will weep and mourn,

Abbott-Smith

πενθέω, -ῶ
[in LXX chiefly for אָבַל ;]
to mourn (for), lament;

(a) intrans. : Mat.5:4 (5) Mat.9:15, 1Co.5:2; π. καὶ κλαίειν, Mat.16:10, Luk.6:25, Jas.4:9, Rev.18:15, 19; before ἐπί, with accusative, Rev.18:11;

(b) trans., with accusative, 2Co.12:21.†
SYN.: see: θρηνέω
(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.