It wasnarrated that Ibn 'Abbas said:
"The Messenger of Allah (ﷺ)said: 'Whoever forgets to send peace and blessings upon me, then hehas missed the road to Paradise.'" (JA)
English reference (JA): Vol. 1, Book 5, Hadith 908 (JA)
Arabic reference (JA): Book 5, Hadith 961 (JA)