To keep to

to adhere strictly to; not to neglect or deviate from; as, to keep to old customs; to keep to a rule; to keep to one's word or promise.

See also: Keep

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
I remember describing My Soul to Keep to someone while it was still in progress, and they asked me, "Have you read Octavia E.