James 1:17 (KJV)   Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning.

The Word variableness has the following meaning:

unpredictability

unsettledness

irregularity

Hebrews 13:8-16 (KJV)   Jesus Christ the same yesterday, and to day, and for ever.

[9] Be not carried about with divers and strange doctrines. For it is a good thing that the heart be established with grace; not with meats, which have not profited them that have been occupied therein.

[10] We have an altar, whereof they have no right to eat which serve the tabernacle. Tabernacle

[11] For the bodies of those beasts, whose blood is brought into the sanctuary by the high priest for sin, are burned without the camp.

[12] Wherefore Jesus also, that he might sanctify the people with his own blood, suffered without the gate.

[13] Let us go forth therefore unto him without the camp, bearing his reproach.

[14] For here have we no continuing city, but we seek one to come.

[15] By him therefore let us offer the sacrifice of praise to God continually, that is, the fruit of our lips giving thanks to his name.

[16] But to do good and to communicate forget not: for with such sacrifices God is well pleased.