Matthew 9:12ἰσχύοντες
On hearing this, Jesus said, “It is not the healthy who need a doctor, but the sick.
Mark 2:17ἰσχύοντες
On hearing this, Jesus told them, “It is not the healthy who need a doctor, but the sick. I have not come to call the righteous, but sinners.”
Luke 6:48ἴσχυσεν
He is like a man building a house, who dug down deep and laid his foundation on the rock. When the flood came, the torrent crashed against that house but could not shake it, because it was well built.
John 21:6ἴσχυον
He told them, “Cast the net on the right side of the boat, and you will find some.” So they cast it there, and they were unable to haul it in because of the great number of fish.
Acts 6:10ἴσχυον
but they could not stand up to his wisdom or the Spirit by whom he spoke.
Galatians 5:6ἰσχύει
For in Christ Jesus neither circumcision nor uncircumcision has any value. What matters is faith expressing itself through love.

Abbott-Smith

ἰσχύω
(ἰσχύς), [in LXX for חָזַק, גִּבּוֹר, עָצַם, etc. ;]

1. to be strong in body: Mat.9:12, Mrk.2:17.

2. to be powerful, have power, prevail: Act.19:20, Rev.12:8; before κατά, with genitive of person(s), Act.19:16; with inf., to be able (MM, Exp., xv): Mat.8:28 26:40, Mrk.5:4 9:18 (inf. understood) Mrk.14:37, Luk.6:48 8:43 13:24 14:6, 29-30 16:3 20:26, Jhn.21:6, Act.6:10 15:10 25:7 27:16; with accusative, Php.4:13, Jas.5:16; of things, to avail, be serviceable (MM, Exp., l.with): Mat.5:13, Gal.5:6, Heb.9:17 (cf. ἐν-, ἐξ-, ἐπ-, κατ-ισχύω).†
(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.