Tawus (may Allah have mercy on him) said: I heard Sayyiduna Ibn Abbas (may Allah be pleased with them both) say: "I was the last of the people to be with Sayyiduna Umar (may Allah be pleased with him), and I heard him say: 'The view is what I said.' I said: 'What did you say?' He said: 'Kalalah is one who has no child.'"
This is how it is in this narration. What we have narrated from Umar and Ibn Abbas on the explanation of kalalah is closer to the evidences of the Book and the Sunnah than this narration, and more worthy of being correct, because this narration stands alone while the narrations from them both consistently say otherwise; and Allah knows best.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12278