evam-in this way; vam-for both of you; tapyatoh-executing austerities; tivram-very severe; tapah-austerity; parama-duskaram-extremely difficult to execute; divya-varsa-celestial years, or years counted according to the higher planetary system; sahasrani-thousand; dvadasa-twelve; iyuh-passed; mat-atmanoh-simply engaged in consciousness of Me.