The Compendium of Bheḷa 6.16.5

6.16.5

pravāhaṇāccatimātraṃ maithunasyātisevanāt | duṣṭapānaprasaṅgāc ca kaṭhināt pṛṣṭhapīḍanāt ||

from excessive straining, excessive indulgence in sexual intercourse, / addiction to unwholesome drinks, and pressure on the back from hard [seats];