It is narrated from Nafi' (may Allah have mercy on him) that Ibn Umar (may Allah be pleased with him) would also say salam at the end of the funeral prayer.
Hadith Referenceمسند الإمام الشافعي / كتاب الجنائز / 592
Hadith Takhrijصحيح اخرجه البيهقي : 4 / 44 ۔ وفى المعرفة السنن والآثار له (2156) ۔ وعبدالرزاق (6449)، (6450) ۔ و ابن ابي شيبة (11491)۔