6 Bible Verses about Adoption, Assurance Of

The Spirit itself bears witness with our spirit, that we are children of God.

for as many as are led by the Spirit of God, these are sons of God.

For ye have not received a spirit of bondage again for fear, but ye have received a spirit of adoption, whereby we cry, Abba, Father.

Whoever has been begotten of God does not practise sin, because his seed abides in him, and he cannot sin, because he has been begotten of God. In this are manifest the children of God and the children of the devil. Whoever does not practise righteousness is not of God, and he who does not love his brother. For this is the message which ye have heard from the beginning, that we should love one another:read more.
not as Cain was of the wicked one, and slew his brother; and on account of what slew he him? because his works were wicked, and those of his brother righteous. Do not wonder, brethren, if the world hate you. We know that we have passed from death to life, because we love the brethren. He who does not love his brother abides in death. Every one that hates his brother is a murderer, and ye know that no murderer has eternal life abiding in him. Hereby we have known love, because he has laid down his life for us; and we ought for the brethren to lay down our lives. But whoso may have the world's substance, and see his brother having need, and shut up his bowels from him, how abides the love of God in him?

My son, despise not the instruction of Jehovah, neither be weary of his chastisement;

And ye have quite forgotten the exhortation which speaks to you as to sons: My son, despise not the chastening of the Lord, nor faint when reproved by him; for whom the Lord loves he chastens, and scourges every son whom he receives. Ye endure for chastening, God conducts himself towards you as towards sons; for who is the son that the father chastens not?read more.
But if ye are without chastening, of which all have been made partakers, then are ye bastards, and not sons. Moreover we have had the fathers of our flesh as chasteners, and we reverenced them; shall we not much rather be in subjection to the Father of spirits, and live? For they indeed chastened for a few days, as seemed good to them; but he for profit, in order to the partaking of his holiness. But no chastening at the time seems to be matter of joy, but of grief; but afterwards yields the peaceful fruit of righteousness to those exercised by it.