2 Corinthians 9:6-7 reads (ESV):
The point is this: whoever sows sparingly will also reap sparingly, and whoever sows bountifully will also reap bountifully. Each one must give as he has decided in his heart, not reluctantly or under compulsion, for God loves a cheerful giver.
Sirach 35:10-13 reads (NRSV):
Be generous when you worship the Lord, and do not stint the first fruits of your hands. With every gift show a cheerful face, and dedicate your tithe with gladness. Give to the Most High as he has given to you, and as generously as you can afford. For the Lord is the one who repays, and he will repay you sevenfold.
How likely is it that Paul's words in 2 Corinthians 9:6-7 were written with an eye to Sirach 35:10-13?
Quotations from any previous scholarship on this question would be much appreciated as part of the answer.