Shiva Purana
ततः स्वाभीष्टचरणन्देवि कर्तुन्त्वमर्हसि ॥ सगर्भा न दहेद्गात्रमिति ब्रह्मनिदेशनम् ॥ ४३॥
O gentle lady, later on, you may do as you please. It is the command of Brahmā that a pregnant woman should not bum herself.
english translation
tataH svAbhISTacaraNandevi kartuntvamarhasi ॥ sagarbhA na dahedgAtramiti brahmanidezanam ॥ 43॥
hk transliteration by Sanscript