1 Samuel 17:39

Then David strapped on his sword over his fighting attire, but he tried in vain to walk [around], for he was not trained to use [them]. So David said to Saul, "I am not able to walk with these, because I am not trained to use [them]." So David removed them.

Hosea 1:7

But I will have pity [on] the house of Judah and I will save them by Yahweh their God, and will not deliver them by bow, sword, war, horses, or horsemen.

Zechariah 4:6

And he answered and said to me, "This [is] the word of Yahweh to Zerubbabel, saying, 'Not by strength and not by power, but [only] by my Spirit,' says Yahweh of hosts.

2 Corinthians 10:4-5

for the weapons of our warfare [are] not merely human, but powerful to God for the tearing down of fortresses, tearing down arguments

Treasury of Scripture Knowledge

Summary

And David girded his sword upon his armour, and he assayed to go; for he had not proved it. And David said unto Saul, I cannot go with these; for I have not proved them. And David put them off him.

Bible References

Put them off

Hosea 1:7
But I will have pity [on] the house of Judah and I will save them by Yahweh their God, and will not deliver them by bow, sword, war, horses, or horsemen.
Zechariah 4:6
And he answered and said to me, "This [is] the word of Yahweh to Zerubbabel, saying, 'Not by strength and not by power, but [only] by my Spirit,' says Yahweh of hosts.
2 Corinthians 10:4
for the weapons of our warfare [are] not merely human, but powerful to God for the tearing down of fortresses, tearing down arguments