Some good poems that can be used for the bereavement of someone close, such as a sister, include "Death Stands Above Me" by Walter Savage Landor, "Because I Could Not Stop For Death" by Emily Dickinson, "Dirge Without Music" by Edna St. Vincent Millay, "November" by Edmund Spenser, "In Memoriam" by Lord Alfred Tennyson and "Funeral Blues" by W. H. Auden, notes Poets.org. Siblings interested in finding more bereavement poems can search the anthology "Inventions of Farewell: A Book of Elegies," edited by Sandra M. Gilbert.
A traditional poem for bereavement is known as an elegy. This form began in ancient Greece and developed into the elegiac style of poetry. An elegiac poem meditates on death, loss and grief using different verse forms, such as eulogies and odes. Poems such as "Because I Could Not Stop For Death" and "In Memoriam" can help siblings mourn their sister by reflecting on the meaning of loss and death.
Siblings may choose to focus more on their relationship to their sister, rather than bereavement. Examples of poems focusing on sisters include "One Sister Have I In Our House" by Emily Dickinson, "To My Sister" by William Wordsworth, "On The Death Of A Sister" by James Grahame, "Brother And Sister" by Lewis Carroll and "The Sisters" by Rainer Maria Rilke, notes Poemhunter.com