to swear, to vow, to take an oath...

oath, vow

surely, upon my word, by Jove...

oath, vow, pledge...

oath, abjuration, pledge

written oath, covenant, pledge

(religious) vow, prayer (for something by making a vow)

oath, vow, attestation...

written oath

vow, oath, pledge

written oath

trial by hot water, putting a person's hand in boiling water to determine their guilt or innocence (with the belief that the innocent would not be scalded)

written oath

vow, oath, pledge

perjury, false oath

Buddha's great vows

to make a joint vow, to swear together, to pledge

bargain sale

to vow to each other

administration of an oath

(written) oath

affiant (person who executes an affidavit)

to swear falsely

to make a vow, to take an oath

to vow to oneself, to promise oneself

to swear to God, to call on heaven as a witness, to cross one's heart

athlete's oath of fair play

Hippocratic oath

before God, as God is my witness, in the name of God...

vows of religious orders