Grading: The hadith is sahih.
Technical note / Defect ('illah): There is no harm in its narrators, but there is disagreement in its narration from Abdullah bin Awn: sometimes he narrates it as al-Sha'bi from al-Ash'ath, sometimes al-Sha'bi from Jarir from al-Ash'ath, sometimes from Jarir and al-Ash'ath (both), and sometimes, with doubt, from Jarir or al-Ash'ath.

Reference / Source: Al-Khatib al-Baghdadi narrated it in "al-Asma' al-Mubhamah" (p. 352) by the route of Ahmad bin al-Walid al-Fahham from Abd al-Wahhab with this same chain.
Details of the narration: It is narrated that Ma'dan (whose nickname was al-Hafshish or al-Jafshish) brought a case against a man of Kindah concerning land before the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) placed the oath upon one of the two parties. The claimant said: O Messenger of Allah, if he swears, my land will go to him. He (peace and blessings be upon him) said: "Leave him, for if he swears falsely..." and then he (peace and blessings be upon him) said something very severe. The narrator Ibn Awn says: I deliberately left that out.

Reference / Source: Al-Tabarani narrated it in "al-Kabir" (636) and "al-Awsat" (1655) by the route of Isa bin Yunus from Ibn Awn, with a meaning similar to al-Khatib al-Baghdadi's narration. Also, Abu Nu'aym transmitted it in "Ma'rifat al-Sahabah" (6350) by the route of al-Nadr bin Shumayl with the doubt "Jarir or al-Ash'ath", and said that Ibn Abi Adi and Mu'adh also narrated it in the same way, with doubt.

Reference / Source: Al-Khatib al-Baghdadi (p. 352) narrated it by the route of Yazid bin Harun from Ibn Awn, with the chain al-Sha'bi, Jarir and al-Ash'ath.

Details of the narration: Al-Ash'ath bin Qays (may Allah be pleased with him) says that a man of ours, "al-Jafshish Abu al-Khayr", had a dispute over land with a man of Hadramawt, which was brought before the Prophet (peace and blessings be upon him). He (peace and blessings be upon him) said to the Hadrami (the claimant): "Produce your witnesses, otherwise he will swear an oath for you." The Hadrami said: My land is too important a matter for him not to swear (falsely) over it (i.e. he will certainly swear). He (peace and blessings be upon him) said: "The oath of a Muslim stands behind what is even greater than that." When the man set off to swear the oath, he (peace and blessings be upon him) said: "If he swears falsely, Allah will enter him into the Fire." Al-Ash'ath went and told him this, and he said: Now make peace between me and him.

Details of the narration: The wording of Isa al-Bajali's narration is that al-Ash'ath said: "Once I bought back my oath for seventy thousand (dirhams or dinars) (i.e. I gave up the property), because I had heard the Messenger of Allah (peace and blessings be upon him) say: 'Whoever seizes the right of a Muslim by means of an oath will meet Allah while He is angry with him.'"
Technical note / Defect ('illah): Both these chains are weak: the first contains Mujalid bin Sa'id, and the second contains Isa al-Bajali and his student Safwan bin Hubayrah, and all of them are weak.

Reference / Source: Ibn Khuzaymah narrated it in "al-Tawhid" (2/ 870) and al-Tabarani (644) by the route of Qays bin Muhammad from his father Muhammad bin al-Ash'ath.
Details of the narration: Al-Ash'ath gifted a slave to his son Muhammad, then, becoming angry over something, swore that he had not gifted him anything. When morning came he returned the slave to him and said: I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever takes a 'yamin sabr' (a binding oath) in order to seize the property of a Muslim will meet Allah on the Day of Resurrection while He is intensely angry with him; if He wills He will pardon him, and if He wills He will punish him."

Grading: The hadith is sahih.
Reference / Source: Imam Ahmad (6/ 3597, 7/ 4395 and 36/ 21841), al-Bukhari (2356, 2515), Muslim (138), Abu Dawud (3243), al-Tirmidhi (1269, 2996), al-Nasa'i (5948, 5950, 10945, 10996) and Ibn Hibban (5084, 5086) narrated it via Shaqiq bin Salamah from Ibn Mas'ud.
Details of the narration: He (peace and blessings be upon him) said: "Whoever seizes the property of a Muslim by swearing a false oath will meet Allah while He is angry with him." On this occasion verse 77 of Surah Al Imran was revealed. Al-Ash'ath (may Allah be pleased with him) confirmed that this verse was revealed concerning a dispute of his over a well.
General principle: Imam al-Nawawi says that a "yamin sabr" is an oath imposed on someone before a judge. The literal meaning of "sabr" is to hold back and to confine.