Abdullah bin Abbas (may Allah be pleased with them both) narrates that the Messenger of Allah (peace and blessings be upon him) gave a verdict based on one witness and an oath. (For a verdict, two witnesses are required; if there are not two witnesses, then a verdict is given based on one witness and the plaintiff's oath.) Ali bin Abdullah says: I asked Yahya bin Saeed about Saif bin Sulaiman, so he said: According to us, he was reliable, among the truthful and those with good memory.