SB 9.1.37
sa tasya tam dasam drstva
krpaya bhrsa-piditah
sudyumnasyasayan pumstvam
upadhavata sankaram
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Upon seeing Sudyumna’s deplorable condition, Vasistha was very much aggrieved. Desiring for Sudyumna to regain his maleness, Vasistha again began to worship Lord Sankara [Siva].