Jamadagni said Abstention from accepting gifts supports penances as their root. Acceptance however, destroys that.
जमदग्निरुवाच प्रतिग्रहे संयमो वै तपो धारयते ध्रुवम्। तद् धनं ब्राह्मणस्येह लुभ्यमानस्य विस्रवेत्॥