Reference for Bava Batra 334:3

אין כותבין שטרי אירוסין ונשואין אלא מדעת שניהם והחתן נותן שכר

AND MARRIAGE<span class="x" onmousemove="('comment',' Kethubah contracts. ');">⁷</span> ARE NOT TO BE WRITTEN EXCEPT WITH THE CONSENT OF BOTH PARTIES, AND THE FEE IS PAID BY THE BRIDE GROOM. A CONTRACT OF TENANCY ON SHARES<span class="x" onmousemove="('comment',' The tenant giving the landowner an agreed portion of the crops. ');">⁸</span> OR ON A FIXED RENTAL<span class="x" onmousemove="('comment',' A certain fixed amount irrespective of the yield of the land. ');">⁹</span>

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