He shouldn't be so vague and go ahead and quote the "scripture". I know what he's referring to, chapter and verse, he should too.
17 They which builded on the wall, and they that bare burdens, with those that laded, every one with one of his hands wrought in the work, and with the other hand held a weapon.
18 For the builders, every one had his sword girded by his side, and so builded. And he that sounded the trumpet was by me.
21 So we laboured in the work: and half of them held the spears from the rising of the morning till the stars appeared.
22 Likewise at the same time said I unto the people, Let every one with his servant lodge within Jerusalem, that in the night they may be a guard to us, and labour on the day.
23 So neither I, nor my brethren, nor my servants, nor the men of the guard which followed me, none of us put off our clothes, saving that every one put them off for washing.
And I know of one recently-retired pastor who always carried when in the pulpit...