Atharvaveda · Sūkta 6.101

6.101.1

आ वृषायस्व श्वसिहि वर्धस्व प्रथयस्व च ।
यथाङ्गं वर्धतां शेपस्तेन योषितमिज्जहि ॥ ६.१०१.१ ॥

Rise like a bull, snort, grow and spread out. As the limb grows, let this member grow; with it, drive forward toward the woman.

येन कृषं वाजयन्ति येन हिन्वन्त्यातुरम् ।
तेनास्य ब्रह्मणस्पते धनुरिवा तानया पसः ॥ ६.१०१.२ ॥

By that with which they strengthen the weakened and stir up the distressed, by that, O Brahmaṇaspati, stretch this man's member like a bow.

आहं तनोमि ते पसो अधि ज्यामिव धन्वनि ।
क्रमस्व ऋष इव रोहितमनवग्लायता सदा ॥ ६.१०१.३ ॥

I stretch your member upon the bow like a bowstring. Advance always without flagging, like a bull or a red deer.