'Sparing' in the Bible

I might harden you with my mouth, And the moving of my lips might be sparing.

Whoso is sparing his rod is hating his son, And whoso is loving him hath hastened him chastisement.

One acquainted with knowledge is sparing his words, And the cool of temper is a man of understanding.

for I have known this, that there shall enter in, after my departing, grievous wolves unto you, not sparing the flock,

And I for a witness on God do call upon my soul, that sparing you, I came not yet to Corinth;