'Perpetual' in the Bible

A perpetual fire must be kept burning on the altar; it must not be quenched.

"This is the offering of Aaron and his sons that they shall present to Yahweh on the day of his being anointed: a tenth of an ephah of finely milled flour [as] a perpetual grain offering, half of it in the morning and half of it in the evening.

Saul {was threatened by David still more}, so Saul {became a perpetual enemy of David}.

Lift your steps to the perpetual ruins, [to] all [that the] enemy has ruined in the sanctuary.

And he beat back his enemies; he gave them over to perpetual scorn.

And grain offering he must provide in addition to it {every morning}, a sixth of an ephah and a third of a hin of olive oil to moisten the finely milled flour [as] a grain offering to Yahweh {as a perpetual statute}.