It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Your oath is valid according to that in which your companion (before whom the oath is being sworn) considers you truthful." This hadith has a sahih (authentic) chain of narration, if Allah wills, although the two Shaykhs did not use Abdullah bin Abi Salih as evidence; however, it has a supporting narration (shahid) from the hadith of Abdullah bin Sa'id al-Maqburi, whose standing is close to that of Abdullah bin Abi Salih.