These mournful words were uttered by Ananda in the Theragatha, the Poems of the Elders, and reveal a very human side of one of the canon's most sensitive characters.
Ananda was the Buddha's cousin and personal attendant, and was always to be found at the master's side throughout the many years of wandering and teaching. As Ananda put it: "For twenty five years I served the Lord with loving deeds, loving words and loving thoughts — when the Buddha paced to and fro, I paced along behind." (Thag 1041-44)
It is Ananda who washed his feet at the end of the day, who arranged his interviews and protected his solitude as best he could, and who tended him lovingly during his final illness. It is Ananda also who we find weeping bitterly at the passing away of the Buddha, and being gently admonished for it by the teacher of non-attachment to changing phenomena (D16:5.14).
After the Buddha's final passing Ananda seems to have been treated somewhat badly by some of the other monks, who were jealous of his close relationship with the master. Poems like this one suggest that Ananda passed a lonely old age and never ceased mourning for his beloved teacher and friend.