Definition of "both"

Abraham took sheep and oxen, and gave them unto Abimelech; and both of them made a covenant.

1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], Genesis 21:27

He will not bear the loss of his rank, because he can bear the loss of his estate; but he will bear both, because he is prepared for both.

1717, Viscount Bolingbroke, Reflexions upon Exile

Irregular bedtimes may disrupt healthy brain development in young children, according to a study of intelligence and sleeping habits. ¶ Going to bed at a different time each night affected girls more than boys, but both fared worse on mental tasks than children who had a set bedtime, researchers found.

2013 July 19, Ian Sample, “Irregular bedtimes may affect children's brains”, in The Guardian Weekly, volume 189, number 6, page 34

Mind you, clothes were clothes in those days. There was a great deal of them, lavish both in material and in workmanship.

1977, Agatha Christie, chapter 4, in An Autobiography, part II, London: Collins

[…] having much aduantage both in number, valure, and forepreparation […]

1598, Philip Sidney, The countesse of Pembrokes Arcadia, page 211

Both mongrel, puppy, whelp, and hound.

1766, [Oliver Goldsmith], The Vicar of Wakefield: […], volumes (please specify |volume=I or II), Salisbury, Wiltshire: […] B. Collins, for F[rancis] Newbery, […]; reprinted London: Elliot Stock, 1885,

He prayeth well who loveth well both man and bird and beast.

1797–1798 (date written), [Samuel Taylor Coleridge], “The Rime of the Ancyent Marinere”, in Lyrical Ballads, with a Few Other Poems, London: […] J[ohn] & A[rthur] Arch, […], published 1798

[…] as he appreciates its beauty and its rich gifts, as he regards it with venerant love, fed by both his intellectual powers, his contemplation, and his meditation.

1892, Richard Congreve, Essays Political, Social, and Religious, volume 2, page 615