Reference for Moed Katan 32:26

ראש השלישים תהא ראש לשלשת אבות הוא עדינו העצני כשהיה יושב ועוסק בתורה היה מעדן עצמו כתולעת ובשעה שיוצא למלחמה היה מקשה עצמו כעץ

What does this mean? - Said R'Abbahu, It means this: 'The God of Israel said, to the [David] spake the Rock of Israel; I rule man; who rules Me? [It is] the righteous: for I make a decree and he [may] annul it'.<span class="x" onmousemove="('comment',' The righteous have power to move God to change his adverse decree by prayer. Cf. Gen. XVIII, 20ff; Ex. XXXII, 7-14.');">³⁴</span> And these tire the names of the mighty of David: Josheb-basshebeth a Tahchemonite [etc.].<span class="x" onmousemove="('comment',' II Sam. XXIII, 8.');">³⁵</span>

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