One quote about the loss of a son is "kindly lay me low / With him I love, at rest" from the poem "A Mother’s Lament for her Son’s Death" by Robert Burns. The poem is about how a mother's son was taken by fate and how his death destroyed her hopes for the future. Whereas she previously feared death, she now eagerly awaits it, because it offers a reunion with her son.
Another quote about the loss of a child is "It soothes my broken heart / And sings to my soul" from the poem "The Mention of My Child's Name" by Kim Knapp. The poem is about a grieving mother who rejoices when she hears the name of her dead child. It argues against the idea that friends shouldn't mention the dead by highlighting how the sound of the child's name brings music to the poet's heart as much as it brings tears to her eyes. The poem claims true friends can help soothe the hearts of the grief-stricken by using the dead child's name.
Another quote about the death of a child is "The child received wings like the other angel, and they flew about together, hand in hand" by Hans Christian Andersen. It is part of a larger quote about how survivors shouldn't mourn the death of a child, because he has united with angels in Heaven and now feels only bliss and peace.