Matthew 5:33ὅρκους
Again, you have heard that it was said to the ancients, ‘Do not break your oath, but fulfill your vows to the Lord.’
Mark 6:26ὅρκους
The king was consumed with sorrow, but because of his oaths and his guests, he did not want to refuse her.
Luke 1:73ὅρκον
the oath He swore to our father Abraham, to grant us
Acts 2:30ὅρκῳ
But he was a prophet and knew that God had promised him on oath that He would place one of his descendants on his throne.
Hebrews 6:16ὅρκος
Men swear by someone greater than themselves, and their oath serves as a confirmation to end all argument.
James 5:12ὅρκον
Above all, my brothers, do not swear, not by heaven or earth or by any other oath. Simply let your “Yes” be yes, and your “No,” no, so that you will not fall under judgment.

Abbott-Smith

ὅρκος, -ου, ὁ
[in LXX chiefly for שֶׁוַע, שִׁבְעָה and cogn. forms ;]
an oath: Mat.14:7 26:72, Luk.1:73, Act.2:30, Heb.6:16-17, Jas.5:12; p1., Mat.5:33 (LXX) Mat.14:9, Mrk.6:26.†
(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.