You have not bought me sweet cane with money.
Worshipers at the temple were keen to bring presents of sweet perfumes to be burned upon the altar of God. But Israel, in the time of her backsliding, became ungenerous and made fewer offerings to her Lord. This was an evidence of coldness of heart toward God and His house.
Reader, does this never happen with you? Is it not possible that the complaint of this text may occasionally, if not frequently, be brought against you? Those who are poor in pocket, if rich in faith, will be accepted even though their gifts are small; but, poor reader, do you give in fair proportion to the Lord, or is the widow's mite kept back from the sacred treasury? The rich believer should be thankful for the wealth entrusted to him but should not forget his large responsibility, for where much is given, much will be required.
But, rich reader, are you mindful of your obligations, and is your giving to the Lord proportionate to the benefit you enjoy? Jesus gave His blood for us; what shall we give to Him? We are His, and He has purchased us for Himself—can we act as if we were our own? O for more consecration! O for more love! Blessed Jesus, how good it is of You to accept our sweet cane bought with money! Nothing is too costly as a tribute to Your unrivaled love, and yet You receive with favor the smallest sincere token of affection! You receive our poor forget-me-nots and love-tokens as though they were intrinsically precious, though indeed they are but as the bunch of wild flowers that the child brings to his mother.
Let us never grow stingy toward You, and from this hour may we never hear You complain of us again for withholding the gifts of our love. We will give You the firstfruits of our increase and pay You tithes of all, and then we will confess, "of your own have we given you."
taken from: http://info.truthforlife.org