(a) Nafi' narrates from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "When there are three people, two should not converse privately to the exclusion of the third, and no man should make another rise from his place and then sit there himself."
(b) Nafi' reported the wording 'la yuqimanna' or 'la yuqim' (let him not make [another] rise).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5896