Brihat Jataka
त्रिकोणगे ज्ञे विबलैस्ततो परैर्मु खाङ्घ्रिहस्तद्विगुणस्तदा भवेत् ॥ अवाग्गवीन्दावशुभैर्भसन्धिगै: शुभेक्षितैश्चेत्कुरुते गिरं चिरात् ॥ ४-१७ ॥
If Mercury is strong in the 5th or 9th house' and the remaining planets are weak, thè child born will have 2 heads, four arms and 4 feet. If Moon is weak in Taurus and malefic planets occupy the sandhies (the last navasha of Cancer, Scorpio or Pisces) the native loses speech. If there is good aspect also on Moon, he picks up speech after much time.
english translation
trikoNage jJe vibalaistato parairmu khAGghrihastadviguNastadA bhavet ॥ avAggavIndAvazubhairbhasandhigai: zubhekSitaizcetkurute giraM cirAt ॥ 4-17 ॥
hk transliteration by Sanscript