All 3 Uses

forbearance
in
The Autobiography of Benjamin Franklin
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I wrote him an ingenuous letter of acknowledgment, crav'd his forbearance a little longer, which he allow'd me, and as soon as I was able, I paid the principal with interest, and many thanks; so that erratum was in some degree corrected.†

forbearance = refraining (holding back) from acting OR patience, tolerance, or self-control
Avoid extreams; forbear resenting injuries so much as you think they deserve.†

forbear = refrain (hold back) from acting
I made it a rule to forbear all direct contradiction to the sentiments of others
*

forbear = refrain (hold back)

Definitions:

(1) (forbearance)
patient tolerance or self-control; or holding back from taking action or enforcing a right

Today, the word, forbearance, is most commonly seen in the field of law to indicate that a legal right, claim or privilege is not being enforced.
(2) (meaning too rare to warrant focus)
The form, forbears is typically a verb, but can be an alternate spelling of the noun forebears; i.e., ancestors. Note that these words put the emphasis on different syllables: for-BEARS v. FORE-bears