Abdullah bin Amir (may Allah be pleased with him) said: I was present with Abu Bakr, Uthman and Umar (may Allah be pleased with them). All of them used to judge by an oath and a witness.
The narration of this from Abu Bakr, Umar and Uthman (may Allah be pleased with them) is weak, while from Ali bin Abi Talib and Ubayy bin Ka'b (may Allah be pleased with them both) it is well known. And in what Sulayman bin Bilal narrated from Rabi'ah bin Abi Abd al-Rahman, Umar bin al-Khattab (may Allah be pleased with him) wrote this to Shurayh; even though that is munqati' (broken), it reinforces the narration of Ibn Abi Sabrah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20674