Strong's numbers

חָזַק (H2388)

châzaq

khaw-zak'

a primitive root; to fasten upon; hence, to seize, be strong (figuratively, courageous, causatively strengthen, cure, help, repair, fortify), obstinate; to bind, restrain, conquer; aid, amend, [idiom] calker, catch, cleave, confirm, be constant, constrain, continue, be of good (take) courage(-ous, -ly), encourage (self), be established, fasten, force, fortify, make hard, harden, help, (lay) hold (fast), lean, maintain, play the man, mend, become (wax) mighty, prevail, be recovered, repair, retain, seize, be (wax) sore, strengthen (self), be stout, be (make, shew, wax) strong(-er), be sure, take (hold), be urgent, behave self valiantly, withstand.

Brown–Driver–Briggs

חָזַק 291 vb. be or grow firm, strong, strengthen

Qal

I intrans. be or grow strong

II transit. only strengthened him not

Pi.

1 make strong (physically)

2 strengthen the hands (acc.) of anyone, sustain, encourage

3 make strong = bold, encourage

4 make firm

5 make rigid, hard, i.e. perverse, obstinate, harden

Hiph.

a make strong, strengthen

b make firm, the kingdom

c display strength

2 make severe, of battle

3 support

4 = repair

5 prevail

6 esp. take or keep hold of, seize, grasp

Hithp.

1 strengthen oneself

2 put forth strength, use one's strength

3 withstand

4 hold strongly with

From Brown, Driver, and Briggs, A Hebrew and English Lexicon of the Old Testament (1906), in the public domain.

266 occurrences

Shown in the King James Version (KJV), whichever translation you read in — it is the text these numbers are tagged against.

Nehemiah 5:16
Yea, also I continued in the work of this wall, neither bought we any land: and all my servants were gathered thither unto the work.
Nehemiah 6:9
For they all made us afraid, saying, Their hands shall be weakened from the work, that it be not done. Now therefore, O God, strengthen my hands.
Nehemiah 10:29
They clave to their brethren, their nobles, and entered into a curse, and into an oath, to walk in God's law, which was given by Moses the servant of God, and to observe and do all the commandments of the LORD our Lord, and his judgments and his statutes;
Job 2:3
And the LORD said unto Satan, Hast thou considered my servant Job, that there is none like him in the earth, a perfect and an upright man, one that feareth God, and escheweth evil? and still he holdeth fast his integrity, although thou movedst me against him, to destroy him without cause.
Job 2:9
Then said his wife unto him, Dost thou still retain thine integrity? curse God, and die.
Job 4:3
Behold, thou hast instructed many, and thou hast strengthened the weak hands.
Job 8:15
He shall lean upon his house, but it shall not stand: he shall hold it fast, but it shall not endure.
Job 8:20
Behold, God will not cast away a perfect man, neither will he help the evil doers:
Job 18:9
The gin shall take him by the heel, and the robber shall prevail against him.
Job 27:6
My righteousness I hold fast, and will not let it go: my heart shall not reproach me so long as I live.