Amr bin Shu'ayb narrates from his father, and he from his grandfather, that a man asked Sayyiduna Abdullah bin Amr (may Allah be pleased with him) about a man in ihram who has intercourse with his wife. He pointed to Sayyiduna Abdullah bin Umar (may Allah be pleased with him) and said: Ask him! Shu'ayb said: The man did not know him, so I went with him, and he asked Sayyiduna Ibn Umar (may Allah be pleased with him). He said: Your Hajj is void. The man said: Then what should I do? He said: Go out with the people and do as the people are doing. When the following year comes, perform Hajj and offer a sacrifice. He returned to Sayyiduna Abdullah bin Amr (may Allah be pleased with him), and I was with him, and he informed him. Then Sayyiduna Abdullah bin Amr (may Allah be pleased with him) sent him to Sayyiduna Ibn Abbas (may Allah be pleased with him), saying: Ask him. Shu'ayb said: I went with him to Sayyiduna Ibn Abbas (may Allah be pleased with him). He asked him, and he too answered as Sayyiduna Ibn Umar (may Allah be pleased with him) had. Then they came back again to Sayyiduna Abdullah bin Amr (may Allah be pleased with him), and I was with them, and he told him fully what Sayyiduna Ibn Abbas (may Allah be pleased with him) had answered. Then he said: What do you say about it? Sayyiduna Abdullah bin Amr (may Allah be pleased with him) said: What these two (that is, Ibn Umar and Ibn Abbas, may Allah be pleased with them) said is what I say.
This chain is sahih (authentic), and it contains evidence that Shu'ayb bin Muhammad bin Abdullah did hear from his grandfather Abdullah bin Amr.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9783