13 Heb “Moses sent to summon.” The verb קָרָא (qara’) followed by the lamed (ל) preposition does not mean “call to” but “summon.” This is a command performance; for them to appear would be to submit to Moses’ authority. This they will not do.
14 The imperfect tense נַעֲלֶה (na’aleh) expresses their unwillingness to report: “we are not willing,” or “we will not.” The verb means “to go up.” It is used in the sense of appearing before an authority or a superior (see, e.g., Gen 46:31; Deut 25:7; Judg 4:5).

In other versions

And Moses sent to call Dathan and Abiram the sons of Eliab, and they said, “We will not come up.

Then Moses summoned Dathan and Abiram, the sons of Eliab. But they said, “We will not come!

Moses sent for Dathan and Abiram, the sons of Eliab, but they said, “We will not come!

Then Moses summoned Dathan and Abiram, the sons of Eliab, but they replied, “We refuse to come before you!

Moses sent to call for Dathan and Abiram son of Eliab, but they said, “We will not come!

And Moses sent to call Dathan and Abiram, the sons of Eliab: which said, We will not come up:

Public Domain