TheFreeDictionary:
"forbidden fruit ... An indulgence or a pleasure that is illegal or is believed to be immoral.... The original forbidden fruit was ... from the tree of knowledge of good and evil in the Garden of Eden; it is now used to refer to anything that is tempting but dangerous (as sexuality)."
Genesis 3:1 Now the serpent was more subtil than any beast of the field which the LORD God had made. And he said unto the woman, Yea, hath God said, Ye shall not eat of every tree of the garden?
2 And the woman said unto the serpent, We may eat of the fruit of the trees of the garden:
3 But of the fruit of the tree which is in the midst of the garden, God hath said, Ye shall not eat of it, neither shall ye touch it, lest ye die.
4 And the serpent said unto the woman, Ye shall not surely die:
5 For God doth know that in the day ye eat thereof, then your eyes shall be opened, and ye shall be as gods, knowing good and evil.
6 And when the woman saw that the tree was good for food, and that it was pleasant to the eyes, and a tree to be desired to make one wise, she took of the fruit thereof, and did eat, and gave also unto her husband with her; and he did eat.
7 And the eyes of them both were opened, and they knew that they were naked; and they sewed fig leaves together, and made themselves aprons.
8 And they heard the voice of the LORD God walking in the garden in the cool of the day: and Adam and his wife hid themselves from the presence of the LORD God amongst the trees of the garden.
9 And the LORD God called unto Adam, and said unto him, Where art thou?
10 And he said, I heard thy voice in the garden, and I was afraid, because I was naked; and I hid myself.
11 And he said, Who told thee that thou wast naked? Hast thou eaten of the tree, whereof I commanded thee that thou shouldest not eat?
12 And the man said, The woman whom thou gavest to be with me, she gave me of the tree, and I did eat.
13 And the LORD God said unto the woman, What is this that thou hast done? And the woman said, The serpent beguiled me, and I did eat.
14 And the LORD God said unto the serpent, Because thou hast done this, thou art cursed above all cattle, and above every beast of the field; upon thy belly shalt thou go, and dust shalt thou eat all the days of thy life:
15 And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.
16 Unto the woman he said, I will greatly multiply thy sorrow and thy conception; in sorrow thou shalt bring forth children; and thy desire shall be to thy husband, and he shall rule over thee.
17 And unto Adam he said, Because thou hast hearkened unto the voice of thy wife, and hast eaten of the tree, of which I commanded thee, saying, Thou shalt not eat of it: cursed is the ground for thy sake; in sorrow shalt thou eat of it all the days of thy life;
18 Thorns also and thistles shall it bring forth to thee; and thou shalt eat the herb of the field;
19 In the sweat of thy face shalt thou eat bread, till thou return unto the ground; for out of it wast thou taken: for dust thou art, and unto dust shalt thou return.
Job 20:12 Though wickedness be sweet in his mouth, though he hide it under his tongue;
13 Though he spare it, and forsake it not; but keep it still within his mouth:
14 Yet his meat in his bowels is turned, it is the gall of asps within him.
15 He hath swallowed down riches, and he shall vomit them up again: God shall cast them out of his belly.
16 He shall suck the poison of asps: the viper's tongue shall slay him.
Proverbs 5:3 For the lips of a strange woman drop as an honeycomb, and her mouth is smoother than oil:
4 But her end [NKJV: but in the end she] is bitter as wormwood, sharp as a two-edged sword.
5 Her feet go down to death; her steps take hold on hell.
6 Lest thou shouldest ponder the path of life, her ways are moveable, that thou canst not know them.
7 Hear me now therefore, O ye children, and depart not from the words of my mouth.
8 Remove thy way far from her, and come not nigh the door of her house:
9 Lest thou give thine honour unto others, and thy years unto the cruel:
10 Lest strangers be filled with thy wealth; and thy labours be in the house of a stranger;
11 And thou mourn at the last, when thy flesh and thy body are consumed,
12 And say, How have I hated instruction, and my heart despised reproof;
13 And have not obeyed the voice of my teachers, nor inclined mine ear to them that instructed me!
Proverbs 9:13 A foolish woman is clamorous: she is simple, and knoweth nothing.
14 For she sitteth at the door of her house, on a seat in the high places of the city,
15 To call passengers who go right on their ways:
16 Whoso is simple, let him turn in hither: and as for him that wanteth understanding, she saith to him,
17 Stolen waters are sweet, and bread eaten in secret is pleasant.
18 But he knoweth not that the dead are there; and that her guests are in the depths of hell.
Proverbs 20:17 Bread of deceit [NIV: gained by fraud] is sweet to a man; but afterwards his mouth shall be filled with gravel.
Topical Bible Studies > Obedience > This Study