'Writings' in the Bible

which He announced before through His prophets in holy writings --

for, as many things as were written before, for our instruction were written before, that through the endurance, and the exhortation of the Writings, we might have the hope.

and now having been made manifest, also, through prophetic writings, according to a command of the age-during God, having been made known to all the nations for obedience of faith --