Talmud do Wyjścia 34:6

When one is writing the Tetragrammaton he may not respond even if the king greets him.²¹All his attention must be concentrated on the sanctity of the divine name. If he was about to write two or three divine names successively,²²E.g. The Lord, the Lord, God in Ex. 34, 6. he may pause between them and respond. After dipping the reed-pen in ink, he may not start with the letters of a divine name²³Because a pen full of ink may cause a blot. but with the preceding letter.²⁴Which, if blotted, can be erased or wiped away. One who erases a single letter of a divine name transgresses a negative commandment. R. Simeon said:²⁵Citing the Scriptural basis of the regulation. On account of this it is stated, Ye shall destroy their name out of that place. Ye shall not do so unto the Lord your God.²⁶Deut. 12, 3f, i.e. the name of God must not be erased.

When one is writing the Tetragrammaton, one may not respond even if the king greets him;²⁰All one’s attention must be concentrated on the writing of the divine name. but if one was about to write two or three divine names successively²¹e.g. The Lord, the Lord, God (Ex. 34, 6) or Deut. 6, 4. one may pause between them and respond.