It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The greeting of salam comes before speaking, and do not invite anyone to food until he has given the greeting of salam."
Imam al-Tirmidhi recorded this report in his Jami'; however, its chain contains a narrator named Anbasah bin Abd al-Rahman, who is matruk (abandoned) and severely weak, on account of which the hadith scholars have declared this hadith weak or fabricated in its chain, although there are other authentic hadiths about the importance of the greeting of salam.
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الأدب / 2695
Hadith Gradingمحدثین:إسناده موضوع
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :موضوع. » «أخرجه سنن الترمذي برقم: 2699، وأخرجه إتحاف الخيرة المهرة بزوائد المسانيد العشرة برقم: 3571، 5279/2»