SEV Biblia, Chapter 29:6
Entonces los príncipes de las familias, y los príncipes de las tribus de Israel, tribunos y centuriones, con los príncipes que tenían a cargo la obra del rey, ofrecieron de su voluntad;
John Gill's Bible Commentary
Ver. 6. Then the chief of the fathers and princes of the tribes of Israel, etc.] The princes of the twelve tribes: and the captains of thousands, and of hundreds, with the rulers over the king’s work; who were now assembled, ( 1 Chronicles 28:1) offered willingly; and cheerfully; needed no more arguments to press them to it, but at once readily communicated.
Matthew Henry Commentary
Verses 1-9 - What is done in works of piety and charity, should be done willingly not by constraint; for God loves a cheerful giver. David set a goo example. This David offered, not from constraint, or for show; but because he had set his affection to the house of God, and thought he could never do enough towards promoting that good work. Those who woul draw others to good, must lead the way themselves.
Original Hebrew
ויתנדבו 5068 שׂרי 8269 האבות 1 ושׂרי 8269 שׁבטי 7626 ישׂראל 3478 ושׂרי 8269 האלפים 505 והמאות 3967 ולשׂרי 8269 מלאכת 4399 המלך׃ 4428