Śatapatha Brāhmaṇa ("of a hundred paths") 13.8.1.13

13.8.1.13

citram paścātsyāt prajā vai citraṃ citraṃ hāsya prajā bhavati yadi citram na syādāpaḥ paścādvottarato vā syurāpohyeva citr!ṃ haivāsya prajā bhavati

Let there be beautiful objects at the back,--for beautiful objects mean offspring: beautiful objects, offspring, will thus accrue to him. If there be no beautiful objects, let there be water either at the back or on the left (north) side, for water is indeed a beautiful object; and beautiful objects, offspring, will indeed accrue to him.