Ubaid bin Jurayj said that one day in Makkah I was sitting with Sayyiduna Abdullah bin Umar (may Allah be pleased with them both), and another day I was sitting with Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both). I observed that Sayyiduna Ibn Umar (may Allah be pleased with them both), in most matters, instead of giving a fatwa, would often say: «لاعلم لي» that I do not have knowledge about this.