(Devarim 23:22) "If you make a vow to the L-rd, you shall not delay to pay it": It is written here "a vow," and elsewhere (Vayikra 7:16) "a vow." Just as there, "a vow or a pledge (nedavah)," so, here, a vow or a pledge. And just as with the vow here, "you shall not delay to pay it," so, with the vow there, you shall not delay to pay it.

"for the L-rd your G-d": This refers to monies, assessments, devotions, and consecrations, (in respect to all of which it is written "to the L-rd.")

"to pay it": it and not its substitute (i.e., if the original were lost, he does not transgress "You shall not delay" with its substitute until three festivals have passed for the substitute.)

"for require shall He require it": These are sin-offerings, guilt-offerings, burnt-offerings, and peace-offerings.

"the L-rd your G-d": These are charities, tithes, first-born (bechor), and the Pesach offering.

"of you": This refers to leket, shikchah, and peah.

"and it will be a sin in you": "in you," and not in your offering (i.e., the offering is kasher even if delayed.)