The Grihya Sutras, Part 1 (SBE29), by Hermann Oldenberg, , at sacred-texts.com
1 1. If (his wife) gives birth to a child, without the Sîmantonnayana having been performed,
2 2. (Or if) the Gâtakarman has not been performed (for the child),
3 7_3. He places, when ten days have elapsed since (the delivery), the little child in the mother's lap,
4. And after he has sacrificed with the Mahâvyâhritis, the sacrifice (that had been omitted, is performed) as (stated) above.
137:1 7, 1. On the Sîmantonnayana, see I, 22.
137:2 The Gâtakarman has been described I, 24.
138:7_3 On the ten days, comp. I, 25, 1 and the note there.